While I think the TSA program is a farce and window dressing and a large waste of time, this program is even worse.
I can spot a FAM on any airplane they just 'stick out." At least now they board with the passengers and not before as in the past. They do 'blend' better. I saw one recently in MSP after he forgot something on the plane he just de-planed. The agent was not going to let him back on until he showed his ID, everyone at the podium then knew he was a FAM.
I do agree about 1/3 of the way back is the best position for them in a plane, close to the front, but iin the back where most of the action has been.