Does this game server have mods, or is it all scripts kicking? If the former then joining w/ a new IP will only get you a perm ban (wrongful ban or not) most likely. Most games have tons of servers .. pick a new one.
I have Comcast, and I know for a fact they won't forcefully change your IP for ANY reason without a Court Order. Kinda lame when you can do it yourself. Only way I know that it is guarenteed to work is leaving your modem off for at least 12 hours, hoping your neighbors or someone else in your node will obtain your IP.
You could also use a free proxy server to mask your real IP. Not sure if that's really ethical in this instance, but if you were wrongfully kicked off then I suppose it could be justified.
Also, you might try releasing and renewing your IP to see if it changes.
From the command prompt:
Chances are that you'll pull the same IP, but it might be dynamic.
Also make sure that if you have a router, you do the /release and /renew on the router itself. Running this locally on a PC when there is a router setup will only pull a different 192.168.1.x IP which is Internal.
You can change a MAC. When I had Qwest.net sometime back and I had a NIC card go bad on me, I swapped it out with another. Not only a different MAC (obviously) but a dif manufacturer (part of the MAC is manufacturer specific, so it will be the same on all 3Com NICs for instance) and the remaining part is unique per card... Never had to contact them.
I wouldn't recommend this for long, but if on DHCP, you can ping for an unused MAC, and then statically assign that to your PC. I wouldn't keep it long though, as if the DHCP server assigns it, and you have it statically assigned, it can cause some probs. The same IP can't be used twice...
If attacks is the consideration, you really need a firewall at your end. Whatever IP you have, you'll notice port scans and stuff not all that uncommonly. If hackers find something of interest, they might test some things off your box, even with another IP. Best to secure your box...
Oh, and BTW, if it's static, don't bother without calling them. All IPs not provisioned are probably locked out of the system. If there's a prob (as one developed with one of my IPs), just call them. My package does come with multiple IPs. Anyhow, when I couldn't even ping the gateway with it, let along browse or play a game, tech support just said "oh, we've had some probs like that with other customers too. Don't know why." No more questions, he did a depro on the non-working IP address, and re-provisioned it right there, no doubt leaving it to their engineers to track down why this was happening to multiple customers, without the customers losing some of their services.