If the comments were not abusive in any fashion but were just informing readers about allegations of fraud against the author and Seeking Alpha editors/moderators deleted those comments, then that's direct evidence of Seeking Alpha having a policy of fact checking: they are checking facts and are deleting
true claims that are contrary to their agenda.
That might or might not be evidence of an illegal "short and distort" scheme.
Also note that the above link leads to an article behind a paywall - the moderators might have used that as an excuse for deletion. Here's key quotes from the cached news article:
'NEW YORK, Sept. 24, 2004 -- In a significant victory for investors, on September 20, 2004, Manhattan Federal Judge Richard M. Berman ruled that buyers of stock issued by Interspeed, a now-defunct corporation that developed internet DSL technology, could proceed with a class-action lawsuit against UBS Warburg LLC and former UBS Warburg Senior Telecommunications Analyst Anton Wahlman. Co-lead counsel for the Plaintiff Class are Marc I. Gross of Pomerantz Haudek Block Grossman & Gross LLP, and Brian P. Murray of Murray, Frank & Sailer LLP.
The lawsuit alleges, among other matters, that between January 3, 2000 and July 20, 2000, UBS Warburg distributed research reports written by Wahlman that were false and misleading because they maintained a "buy" rating on Interspeed stock while, at the same time, Wahlman was privately sending e-mails to UBS personnel indicating that he believed that Interspeed stock should be shorted. The lawsuit also charges that Wahlman's research reports were false and misleading because Wahlman failed to disclose to the investing public his belief that Interspeed was engaging in "creative accounting."
According to the Complaint, for example, On January 3, 2000, UBS Warburg issued a research report by Wahlman that rated Interspeed a "buy." Just two days later, Wahlman privately e-mailed a member of UBS Warburg's sales force, "(d)on't put people into Interspeed -- very risky." Fifteen minutes later, the recipient of the e-mail responded, asking "so why is (Interspeed) a short?" Wahlman replied, "(j)ust lumpy revenue, some stuffing of channel, creative accounting."'
...
But note that after UBS/Wahlman losing the motion to dismiss the actual class action lawsuit against UBS and Wahlman was settled:
Docket for Bernard v. UBS Warburg, LLC, 1:03-cv-04282 - CourtListener.com
"ORDER denying 12 Motion to Dismiss. For the reasons stated in this Order, Defendants' motion to dismiss (12) is denied."
Here's a Stanford summary of the case:
Securities Class Action Clearinghouse: Case Page
The lawsuit alleges, among other matters, that during the class period, UBS Warburg distributed research reports written by former UBS Warburg Senior Telecommunications Analyst that were false and misleading because they maintained a "buy" rating on Interspeed stock while, at the same time, the Analyst was privately sending e-mails to UBS personnel indicating that he believed that Interspeed stock should be shorted. The lawsuit also charges that the Analyst’s research reports were false and misleading because he failed to disclose to the investing public his belief that Interspeed was engaging in "creative accounting."
According to the Complaint, for example, on January 3, 2000, UBS Warburg issued a research report by the Analyst that rated Interspeed a "buy." Just two days later, the Analyst privately e-mailed a member of UBS Warburg's sales force, "(d)on't put people into Interspeed -- very risky." Fifteen minutes later, the recipient of the e-mail responded, asking "so why is (Interspeed) a short?" The Analyst replied, "(j)ust lumpy revenue, some stuffing of channel, creative accounting."
The lawsuit charges that UBS Warburg's and UBS Warburg Senior Telecommunications Analyst’s motive for issuing the fraudulent analyst reports was the desire to garner investment banking fees from Interspeed. The Complaint alleges that UBS Warburg earned $700,000 for underwriting Interspeed's 1999 initial public offering. The lawsuit also charges that if UBS Warburg had published truthful reports by the Analyst, the stock price of Interspeed would have plummeted.
The order denying the motion to dismiss isn't on RECAP - could someone please buy it on PACER and put it on RECAP? Maybe that order has some of the facts cited by the court.
The settlement agreement was 5 million dollars:
The allegations never got to trial and the defendants didn't admit guilt.
Also note that if the allegations were true (and Wahlman got deposed and the emails that were quoted were possibly from discovery), Wahlman actually identified a
genuine short target - the alleged fraud was that he hid this fact from client and kept recommending the company to clients that he knew was risky and which UBS (probably) kept shorting.
I.e. if these allegations are true then UBS was trading against their clients with the collusion of their analyst.