I hope not, while they are good for a laugh, the amount of effort the Rovers need to put in to ensuring the con goers don't break rules/laws is ridiculous. Furthermore, it gets to be a traffic congestion if police show up to ensure things don't escalate. I mean, the cops and rovers are pretty lenient, but it's such a waste of time and energy for everyone.
Don't get me wrong, I've had plenty of fun messing with these jerks such as the year my Tetris block group caused a huge character battle starting with me ramming the Rubik's cube girl or the year I was offering to make out with guy right next to the protesters, so I know I've wasted plenty of time on them. But in a way they are part of the con as much as the other gatherings. And hell, they can bring spontaneous fun. The aforementioned character battle went on for an hour or so and everyone stopped paying attention to the protesters and focused on us or even joined in.