What in the world would they do to your mac addresS

Mac address is only for Ethernet, aka so your router knows where your computer is and can give it an IP, and address frames/Package in the LAN,
What you are thinking about is the IP address, But that does not matter, Just bot on the bot account, ive done it alot, and had some wow accounts banned also, And nothing have ever happend to my main account, i even botted and raided the same time, and nothing have happend yet, you can be relaxed