In society & politics there are many single-issue groups which have their "pet" issues. They unite and make a little bit of noise for awhile, but usually their concerns are ignored. What strikes me as interesting is how serious they consider their cause. I'm not going to deny that there is some level of seriousness in the matters they bring up, but I'm not going to lose sleep over it either.
So anyway, here's one rather interesting group I found out here in California trying to effect driving laws (they've been getting some cable news coverage as well):
http://www.leftlanedrivers.org/
Can you guys find some interesting ones as well?