You can ghost your IP by setting up to generate a "new" proxy address with every log on but you can't hide your MAC address as it's the physical address of you networking card or more specifically the chip on the card , unless you swap cards every time we figure out who you are and that could get to be way more expensive than it's worth real quick .
PS I'm sure some pimpley faced 13 year old in his moms basement could prove me wrong about hiding the MAC address but so far I haven't seen any talk of doing it successfully