How can it tell if your an alt or another user on the same computer? -Apple allows 5 different user on each Mac.
@Vanadis: No system can tell if you're an alt or just another user who just happens to use the same IP. It doesn't even have to be the same computer: with networks like in universities, companies or in internet cafes, or hotspots in cafes and train stations, the IP it reads is that of the network router, not of the computer you use. So if someone atthe cafe you frequently use is in SL with their laptop, causing some grief, and you log in with your laptop while having your frappe, you'll be considered their alt, because you use the same IP address (the same router) to log in.And if your ISP hands out dynamic IP addresses, you can get an IP today that was used by a "griefer" yesterday - so you'll be treated as their alt and banned without even knowing what happened and why it happened to you.
What Gem said is exactly right. Dynamic IP addresses, Wifi, people living in the same household, etc. all make alt matching via IP addresses horribly unreliable. Because of all these bad IP matches, many innocent people are being wrongly banned grid-wide.
NC in store seems to indicate that its no longer available. Lets see how long that lasts.
Thanks sirhc. I'll definitely have a look when I get in-world later. :)