If "Security" did get on your plane and you flew with the same passengers who had been disruptive, then you flew with a bunch complete bunch of amateurs. Here's the reason. In the the air, the only people who are able to keep any sort of order are the cabin crew. If they are unable to manage these people on the ground, they have absolutely no chance in the air. It's not that the cabin crew were deficient, it's just that they are neither night club bouncers nor police officers. Their only weapons are charm, persuasion and reason. If they prove ineffective with certain people on the ground then to fly with the same people is quite stupid. Unfortunately, there are some people are unsuitable for air travel and it should be up to them to find another form of transport. Furthermore, "Security" despite their implied remit have no real powers on an aircraft. Also, their lack of training (especially in the UK) means that they will be more if a hindrance than help. And how do you determine who they are? These are the only people in who don't display their IDs. Therefore, if any external muscle is required, it has to be the police or their local equivalent.