Weapon Restriction

[boyle_heights]

I have some weaspons restricted. The shield is always restricted. In some maps we restrict some sniper weapons. The shield is banned in the server.cfg file. The weapons are banned using map config files.
The problem is that players can buy the restricted weapons by typing the name in the console. If you use a regular buy menu it can't be bought but typing Awp in the console will buy them the awp if they have the money for it. Is there anything we can do so players don't get around the restrictions?
We are using AMX Mod.