It's a valid point. But TFRs are also limited by altitude (3000-4000 feet AGL). So one can dive or drop a bomb from ~0.5NM (10-15 secs). Even with a minute warn

It's a valid point. But TFRs are also limited by altitude (3000-4000 feet AGL). So one can dive or drop a bomb from ~0.5NM (10-15 secs). Even with a minute warning, I can't see how VIP can be evacuated out of a building especially if s/he is not on the 1st floor.