So AOPA has been concerned about the future of GA for some time, but it seems they didn't see this one coming. For those still doubting the effects sequestration will have on general aviation, here is a link to an Airports Council International/North America briefing on the latest details on the FAA's planned closure of 173 "contract towers" (aka Non-Federal Control Tower or NFCT).
Walt Cochran, ATO's Vice President of Terminal Operations stated the FAA was "unable to consider local community impacts" and the only criteria would be how the "national interest" would be affected. "National interest" was not defined. Affected non-federal control towers are free to seek local or state funding to keep their facilities open.
The FAA is still considering closure of the remaining 49 towers, but since these are federally operated, the National Air Traffic Controllers Association will need to be involved in the negotiations.
At my home airport, KOAK, the North Field tower may be closed due to reduced staffing levels. Such a closure could limit or completely preclude touch-and-goes/pattern work, practice instrument approaches, and could even impact noise abatement procedures.
So let's review: Safety will suffer as Class D airports become non-tower airports, a flurry of NOTAMs will have to be issued, many pilots will not read said NOTAMs, and flight training operations will be adversely affected. Pilots who are planning to do check rides will be affected as will professional instructors trying to earn a living.
If this doesn't sound like your cup of tea, this would be a good time to let your federal, elected representatives know how you feel.