It also is just good business sense for Tesla to walk the fine line between allowing this while not exactly promoting it. Remember, 99% of the car market is still ICE and 90% of that market is people convinced that range on any EV is horrible. Tesla is better served with having that myth disproved than confirmed.
I have no doubt that will happen to a large extent simply for practical reasons:
- Individual infractions here and there are simply lost in the noise
- Action when at small scale is not worth the effort to enforce
- Even once they feel it's problematic there may be some hesitancy to act in order to not disgruntle customers patronizing the partners in the program
But again, the problem becomes one of scale. I wish I could count the times I've seen a generous provision removed with a note to the effect of "Unfortunately we are no longer able to offer complimentary XXXXX because of customer abuse."
If you don't think that's possible or likely, just look at the number of folks willing to put themselves out in terms of time and effort to cop a free charge at a Supercharger or some other free charging station when they could charge at home. Do you think abuses for the destination charging program aren't going to become more problematic when there are 10x more EV's on the road? 100x?
Meanwhile the rest of the folks who have supported Tesla financially with their patronage and are using the program within it's intent are disadvantaged.
So I suspect Tesla will go down the path of including stricter language with the partner agreements, more specific signage, etc... Then the cat-&-mouse game of technical enforcement and subsequent bypassing (as @stopcrazypp has described) will continue. Hopefully it doesn't become problematic enough for it to simply not be worth the effort.
I repeat: This is why we can't have nice things.