Mhm yep, biggest reason I'm really against it. Not like you can't stop donators in the first place.
Bonk scouts, dead ringer spies, airblasting, ubers, etc. You could easily uber a pyro and go annoy any spawncamper.
OR another donor can simply do the same, there's TON of us.
And it's just a trade server, people need to learn to not care.
And on another note, this lets donors troll OTHER DONORS, worse than regular airblasting, and huntsman taunt-stunlocking. I'm pretty sure I know who you are, anon, since I airblasted you a couple times towards my spawn if you are who I think you are, and caused you to lose god mode, then smacking you with my Axetinguisher
On another note though, trade server maps are always so badly designed, spawn point wise, this lets spawncamping happen no matter what, donors or not. Except for the new minecraft realms one. That one is actually legit.