Since they demonstrate the tactical capacity to put a bunch of people in a place, at a time, without law enforcement getting a sniff of it beforehand.
Don't think of it as terrorism per se: think of it as a people-organizing toolset, and it ought to terrify any police state who's paying attention. To the extent the US behaves like a police state, this is a threat.
Take a look at Improv Everywhere's Cell Phone Symphony. Heck, much of what IE does is militarily relevant. It says, "We're a bunch of peaceful clowns. But if we'd wanted to get you, you'd have been got". It says "Your security theater is irrelevant".
You're conflating a 'customer-support' interaction with the criticism role. I won't dispute that lots of linuxy and open-sourcey communities are not safe for tenderfeet: you're absolutely right.
But it's a different topic.
From mailing lists and public bug trackers, my sense is that there are plenty of critics, and they are frequently able to find the right place to criticize.
I think that the extent of criticism within the system reduces the need for lobbying in the press to get your pet peeve addressed.
Suggest you just sit there and wait till life gets easier.