I would tend to agree. Having flown on many low cost and full service airlines, I am often stunned at the calibre of some crew. It would appear that some are just dragged off of the street. At work I met one FA who thought 9/11 was bombs, and not planes, and another who did not know what 'overwings' were. I've also heard of one deliberately setting a fire so to appear as a hero when he put out the fire, crew stealing money, stealing safety equipment, one having a major breakdown midair after a security threat was made to a flight, cabin crew screaming 'we're going to die' during turbulence and many other incidents that do make me wonder how they got a job. Often I just think it's a matter of: are they 18? TICK. Pretty? TICK. Then they're taken on.
A majority are good, but as flight crew, we don't necessarily control who comes into the flight deck. I know which ones I wouldn't want in, but that's because I doubt their integrity and ability and not because I fear they will be a security threat.
Airlines need to rethink their recruitment policy. It is a responsible job and putting someone who's just turned 18 and has never worked before is simply not good enough.