This is kind of related:
Is it worth it to join AOPA? I know they are a big lobbying group as well as producers of a glossy magazine with airplane photos; but what exactly do they do for you?
AOPA is General Aviation oriented, but they (and EAA too) do good work by pushing back on some TSA (and other agencies) whiz kid good ideas.
Specifically, a couple years ago the TSA wanted a national ID card program for all pilots. (Yes, in addition to your pilot certificate that already has your full name, DOB, height/weight, eye/hair color, address...) Another good ideas was earlier this year when the FCC randomly decided to ban all 121.5 ELTs this year and figured a couple months notice ought to be enough heads-up. Off the top of my head, about seven years ago in Chicago, Mayor Daley gave the city more parkland and saved it from the terrorist threat of Meigs Field by bulldozing the runways in the middle of the night. Luckily, he didn't even tell the FAA- I guess a NOTAM could've tipped off the terrorists. Anyway, there was pushback before that happened and fallout afterward.
Food for thought