Its the sort of overreaction that bof gives that makes terrorists win.
Talking about a possibility is very far from teaching someone how to fly an aircraft, develop their skill, plan, re plan and execute a terrible act.
If you want some ideas for how to cause mass panic, widespread deaths, and stop us from living our lives the way we are accustomed, then look no further than your own imagination, or indeed your history books.
The Japanese regulary crashed aeroplanes into things, the Brits and Germans used mustard gas in the war, the Americans use fuel-air bombs, many countries use mines and other very nasty things. Do you really think a rumour network on the net will start the next terrorist threat?
While today's threat is pretty nasty, things have been much worse in the past. Lets not forget the wars all around the world, the terrorists in many different countries, not to mention state sponsored terrorism, whether it is as a privateer or a recognised armed force.
We have to bne realistic about this threat, it is not time to give up our liberty just yet. We are a long way from needing to do that.