[MaximusBrood]

A quickly made this 1
It won't punish people for using the command, but it will sucessfully block it.

You can insert it in any plugin to block the command

#include <amxmodx>
#include <amxmisc>

public plugin_init(){
    register_plugin("FullUpdateBlocker", "0.1", "MaximusBrood[NL]")
    register_concmd("fullupdate", "block")
}

public block(id)
{
    return PLUGIN_HANDLED
}