Regarding proposing solutions, Bruce Schneier, who was describing TSA efforts as "security theater" at least 5 years ago, is perhaps among the most famous: he's been on 60 Minutes over the issue, publicly debated the former head of the TSA, and testified before Congress as to what measures real security would entail. Just last week there was a humorously worded rant about the TSA's stunning lack of competence by the former head of Israeli airport security, Rafi Sela.
It's also worth noting that the biggest objectively measurable improvement to travellers' security is the change in attitude of travellers themselves. The belief of passengers that they will be flown to Cuba and a release negotiated was dispelled even before 9/11 was over. These days, when someone tries to light their shoes on fire, passengers can be reliably counted upon to beat them down. Literally.
If the TSA was needed, I'd probably be a lot more acceptable, but at the end of the day, there is no evidence that suggests they stop terrorists attacks and there is no evidence that they make flights safer.