Tried to post this yesterday, but haven't seen it yet soo . . .

[Scoojitsu]

Nah you don't get banned. First of all if you lose connection you drop out of game. You cannot stay connected while switching IP address.
You also cannot connect to the same server twice with the same IP. That's why people need that IP exemption.

If they suspect you're one guy boxing two accounts they'll test you. As long as you're two people you won't have a problem passing those tests.

I think using a VPN or mobile hotspot is perfectly fine.