MAC filtering is for blocking external intrusion, it can be used, but you're saying dont use MAC filtering because someone in the house can learn to Spoof. Yes, not useful, but yes.
Personaly I'm just watching a circle spinning on the MAC page, and was googling to find out why. So you are VM tech support, and you don't agree with MAC filtering because it's powerful enough to cause you extra work? That's just horrifically unprofesional. I don't suppose you have a degree in a computer related feild then?
Imagine saying dont bother MAC filtering for everyone on the internet, because you dont like phone calls. Disgusting mate, absolutely abhorrent attitude.