I'm going to work under the assumption you've never hosted a server before. I'm not so sure that the ban should be lifted either. You clearly were in support of crashing the server. Who's to say you won't be "testing out" more bugs in the future... on a server YOU DON'T OWN.
If I sound a bit angry you'll have to forgive me, I enjoy playing TF2 on these servers and when someone denies me that privelage for no reason, I get a bit upset.