Ill buy such plugin soon and share with you.U can use any amxx cvar enforcer on this forum I find 2 normal versions but as I said its not possible to lock cvars on steam like client_cmd (id," alias gl_polyoffset" ) It was possible on 47 potocol and non steam
simpliest way to do that is to use
public client_connect(id)
{
client_cmd(id, "gl_Polyoffset 0.1)
but it is slowhacking
on forum u can find 2 plugins with agreement
http://forums.alliedmods.net/showthread.php?p=462873
and
http://forums.alliedmods.net/showthread.php?p=393427
second variant is better
it checks changing (ed) cvar every x seconds,