If you drop you're transmitter I think you have more things to worry about than just the aerial.
I see more damage from interfierence than from dropping transmitters too. Infact I dont think ive ever seen anybody drop a transmitter, most people are carefull.
I have saw cars plow into walls at full throttle due to somebody turning on on the same frequency though. (including mine)
So i'd rather be carefull and not drop my transmitter