I don't think you have to worry about the fandom becoming overly sexualised. It always has been.
Given how we've been the punching bag of the internet since forever, it's inevitable that opportunist American politicians will do the same as there's really very little difference between them and internet trolls.
If you want to have a convention that's much more sfw go for it.
Maybe I'm controversial but I'd rather not have kids around at furry conventions at all. While the fandom is not a kink thing like, say, the BDSM community, the sexual aspects permeate a pretty good chunk of it. I'd rather exclude kids than having to restrict self-presentation due to their presence, which I personally inevitably do even though I don't wear BDSM gear around at cons.
The pup gear absolutely is fetish clothing, and I prefer cons where there's a place for it, though even then I'd prefer it just being there at late evenings and events rather than in my face all day long.