Replace grindr by some_other_site where some_other_site.orientation != 'straight' or some_other_site.fetish in (...) and it works out to the same result, no?
Grindr is mostly used for semi-anonymous "hookups" - I am told anecdotally by people who used it and by the media at large - which is something even out and proud people might not wish the world to know (e.g. because their spouse might disprove), especially not in harsh detail.
A lot of the communication on grindr ought to be pretty explicit too given how it gets used, something you might not want to see made public either, even if you're out of the closet already.
Now the other theoretical site might be as "bad" or even more so as grindr (the fetish website you suggested), or it might be a "tame" website used mostly in a "tame" manner, which of course still has "potential" to a blackmailer, but less so than the grindrs, tinders, backpages, adultfriendfrinders, etc of this world.
Yeah, definitely. I think it's arguable the same rational could even apply to a dating site for straight people. It would take a little more work and probably be less fruitful overall, but an adversary's intelligence agency could use it identify straight people (with security clearances) who may be trying to cheat on their spouses or whose marriage is disintegrating. Both of those situations could open someone up to manipulation (a honey trap [1], for instance).
Knowing someone is gay is a classic blackmail situation, particularly within the gov world. Grindr is very sexually charged, so you get the most extreme sensitive bits here, combined with high profile people that are closeted and don’t want this information leaked. Not the same situation.
Grindr is mostly used for semi-anonymous "hookups" - I am told anecdotally by people who used it and by the media at large - which is something even out and proud people might not wish the world to know (e.g. because their spouse might disprove), especially not in harsh detail. A lot of the communication on grindr ought to be pretty explicit too given how it gets used, something you might not want to see made public either, even if you're out of the closet already.
Now the other theoretical site might be as "bad" or even more so as grindr (the fetish website you suggested), or it might be a "tame" website used mostly in a "tame" manner, which of course still has "potential" to a blackmailer, but less so than the grindrs, tinders, backpages, adultfriendfrinders, etc of this world.