You must note that the -1/+1 System is implemented in a large collection of Garry's Mod Server Communitiea.
The System might as well be a part of Servers that offer Forums,
If you complain about the -1/+1 System being corrupt, you are basically saying that every Community that uses it, is corrupt.
I do understand that some people may misuse the System, and if you have proof that they are, you can report them and get them possibly demoted for biasedness.