Sniper is a fun class, but those who have no skill rely on it as a crutch.
In worst case senarios something like this can happen.
http://forums.teamcdrive.com/showthread.php?t=305
When people do this the server comes to a stop, and no longer becomes a venu of pleasure. But attains an atmosphere of ill will and general "Assholedness".
Are snipers really worth this much trouble.