I noticed some people like @Mark Z have sigs like this "This post contains data only for the use of the TMC or TM forums. Please PM for permission to copy or link outside the forums." Model X - Flawed or Flawless? has one of these. However, today I noticed that unless you're logged into "TMC", sigs won't actually appear and thus outsiders won't see that warning. Try it. Either logout or open an incognito/private window in your browser and visit the above. Not sure if this is by design or a side effect of the forum software change.