I really don't see that happening though. If anything the complete opposite. Maybe 1 or 2 people NOT enjoying it.
Here, think of it this way:
We have xXCuntDestroyerXx. He loves to play TTT. He frequents popular TTT servers with normal karma systems. Those servers probably keep the normal karma because they don't have the rdming/trolling problem we do. He stumbles upon our RND server with perma karma + your karma idea. He doesn't know about either until the next map, where he notices his karma was significantly lower.
He'll ask the frequent players, and they'll tell him about the system and blablabla insert reasons here.
And this is where our views conflict.
With mine, he'll say "My karma is permanent and I lose 300 every map change? Who's fucking bright idea was that? Fuck this shit."
xXCuntDestroyerXx disconnects. He wont stick around long enough to think of the reasons and if he agrees with them.
With yours, he'll say "Wow, this system really helps against the baiters and rdmers, I think I'll like it here."
He stays and becomes regular.
Which one is generally going to happen first?