Then why are all the "abusing" commands in there Because they're in on default. And it's difficult to keep them disabled (they'll get restored with every Sourcemod update).
If you have an AMD (won't work for Intel!) processor (dual-core or more) and Windows XP you can also install the dual-core optimizer: http://support.amd.com/us/Pages/dynamicDetails.aspx?ListID=c5cd2c08-1432-4756-aafa-4d9dc646342f&ItemID=153