I was staying at a hotel, and could not get online in the room via the hotel's wireless system. I called the "technology department" who asked me for my MAC address, which he told me how to look up.
After giving him the info, he played around for a few minutes, but was unable to solve the problem. The line got cut off, and when I called back, another person in the tech dept asked me what browser I was using. I use Chrome, but he suggested I try Internet Explorer. That solved the problem, without my having to give away any "private" information.
Can the first person, who knows my MAC address, hack into my computer with it?