It's once a year. And the idea is to fight back against stigmas that have made such behavior illegal, or grounds for being fired, or having your kids taken away.

I don't know who needs to hear this, but having gay sex in the privacy of your home while you're tied up in a leather harness should not result in those consequences. Display of similar behaviors at Pride are intended to tell the larger world that they aren't going to stop being themselves. People need to grow a thicker skin and get used to the idea, so that Pride isn't necessary any longer.

I personally find that the most uncivilized people always come dressed in suit and tie.

Like any other thing, it depends on why someone wears it. A trans man wearing a traditional man's cut to celebrate getting top surgery at pride is probably not what you had in mind though.

Hm, I'd personally go with a bow tie.

Nothing wrong with those.

Boundaries that delineate these celebrations have been explicit in SF at least since I started going in the early 2000s. The intent is to create a safe space for participants. Within that realm at those times the boundaries represent the presence of that space and that "normal social conduct" is no longer the norm.

Who defines "civilized" and why does that seem to particularly exclude specific categories of people?