Think of one community that lets you get banned like 10 times and still get unbanned. Think of the amount of time people have to waste on idiots just because they know how lenient the admins are..you can't get perma'd even if you try. You can hack (cheat) your tits off and still come back with a new key. How many people cheat with wallhacks just because they know how the admins aren't going to care even if it was possible to prove it? You can just come back NP.
cRPG is probably one of the most hacker/griefer free mods I've ever seen. Have you ever stepped outside and played any game besides Warband? Anyone can buy keys to avoid being banned, in any game. You make it look like admins have a rough time dealing with "trolls" but that's really not the case.
For starters, close to no one bothers hacking Warband, let alone join a Warband mod just to hack. Ever seen a hack that allows you to crash the server? Any invisibility hack? Speedhacking? Name stealing? It's just not "profitable". That leaves hackers/griefers out. Furthermore, considering how many active admins cRPG has, it's almost impossible to get away with anything because they'll just check the logs and ban you either way. So teamkillers/teamhitters are out too. Another threat erradicated. What does that leave us with? People like Allers that get banned over and over again? Tell me, does it really bother that he may be able to come back? What's the worse he is going to do, get banned again? Why should that concern you? Waste their time on idiots? You mean the minute it takes to ban him? Again, I don't see how that affects you in the slightest.