I just moved and I've been too lazy to take my router out of it's box.
So I've been manually disconnecting and reconnecting the CAT5 from computer to computer.
While doing this, I realized my ISP would assign me a different IP

I've always thought I'd have to call them up, to request a different IP.

By theory, shouldn't I be able to spoof my MAC address various times, to get assigned different IPs?

Or, are there other factors to take into account of here besides my MAC address?