Ban the post above you! Game!

Banned for having a cardboard box that looks like a cassette tape for your avatar...

For the younglings out there, cassette tapes predate CDs for storing music.
 
Banned because you mentioned cake while I'm sad that I can't download Fable 3 even though I'm a Gold member and there's no more cake.
 
Banned because it's now time for a math lesson.

Any number x and any number y work in such a way that:
x + y = 9
x - y = 9
x * y = 9
x / y = 9
 
Banned for giving math lessons on a Monday

If it were just the first two I'd have the answer....