Well, I would say yes, provided that the people themselves are clothed modestly since most Pride festivals are kid friendly

Luigi Got Big Tits

Only if the pride festival is 18+ and closed off with people checking I.D.s

No, pride ahould be an loccasion to show your "pride" (Don't you say?") to be who you are as a gay person, imagine seeing people walking around in diapers and quite questionable gears, absolutely not.
PS.: since that's the topic, not even at furrycons I would allow people that do these stuff
PS2.: sorry for typos using mobile

I dont think they should because kinks and such are not actually related to the LGBT. In my opinion kinks are neutral/unisex because everyone are affected and influenced. But in other hand might turn into a kinkshame mess. My best advice would be to, yes allow them but with decency especially with bdsm related

At San Francisco Pride Kinks are allowed to a limit. You can walk around in gear or nude. Even in the parade there is a small section of kink floats (mostly nudist groups & leather community). But there is also a section of the festival that is just for familys & underage teens.

But San Francisco also has a Kink Festival called the Folsom Street fair. Which is people in leather, tied up, wearing diapees, being spanked, fucking, drag, & watersports (only in the pool section). The main rule at that event is 18+ only & dont touch someone without consent.

they shouldnt because kinks arent related to LGBT

I agree with some of the comments below its sexual identification pride. Not my sex life pride and is not match topic wise. I agree with kink events. But you dont go promote bdsm at a sci-fi con. Dont do it at a pride event. Let them enjoy it. If they want to explore theres ways to get found.