I am no expert when it comes to US aviation and safety policies but , " We don't like the way you look" is no reason for whisking someone away. Obviously national security will come first for any country but this incident does not seem to have anything to do with national security , the person causing the problem had already been detained , there is absolutely no reason to point a gun at the remaining passengers just because they are making noise, its a free country for heaven's sake , leave alone detain someone after you go and dump a rowdy passenger next to him . It is pretty natural for any human to panic , after seeing a guy in an aircraft being taken away.This is not security , this is discrimination , I will not call it racial because from what I can make of the posts in this forum everybody is at the recieving end .
There need to be clear cut definition of as to where the marshalls come in to the picture . If a passenger is drunk and making a scene of himself it should be the flight attendants taking care of him like always , not the air marshalls.All crews are trained to handle rowdy passengers , being shot dead for being drunk is not my definition of justice.
If somebody trys to barge into the cockpit or or threaten someone then its the marshalls game .Their instructions should be the final authority in that case , however they should act if and only if the crew requests for it. Come on guys there are a lot of crew members on this forum , they can probably help me out here , every single one of them would have definitely encountered some rowdy passenger at some point in their careers .
Marshalls going on a power trip is simply a no no.
Well my 2 cents .