Funny you should bring that up, because that's exactly what started this whole buggy alumni association in a strange way. PiKA has been doing that for as long as anybody can remember, and everyone thinks it's obnoxious, but that doesn't bother them. One time last year, I got annoyed and created .
The comment threads there were so active that we realized that buggy alumni (and current students) were craving a way to talk about buggy and know each other. So we formed this non-partisan organization that is just about promoting buggy and providing a channel for people to talk buggy.
As to your original question though, I think it's entirely appropriate for you to post all of your pictures on pikabuggy.com. There are no rules in buggy about taking pictures, but it's pretty clear that sending thugs after anyone with a camera is not generally accepted on public streets.