MAC sniffer

i know someone local to me who uses a mac sniffer which collects mac address to trade with other areas. so obviously hes trading my mac address. can i prevent my mac address being ‘sniffed’? the mac address comes from the hardware ?(ethernet on my mobo) reinstalling windows, which i did recently will will make no difference?

this is a good question.

From what i have read the MAC address is hardcoded into the chip
But can be faked on some windows systems, the link below shows how to do it on some systems

If you can do this he will get a Fake MAC address ;D