I don't want to fly because I am scared of terrorism.

Well - I don't have much to say here. Bringing a little bit of dry humor into this area isn't really possible, after the devastation of recent acts of terrorism.

Soon it might be "I don't want to go outside I am scared of terrorism".

Stay locked up in your house all your life if you wish - it's your choice. But hey, I wouldn't worry about it - you are just giving into one of their goals.