I'm in Plymouth apparently - about 30 miles out but only just on the opposite bank of the Tamar so not bad. And I did live there as a kid.
IPs are useful for identifying 'dupers' on forums if there's an issue on people using more than one account (it's a nasty habit in some places as the people who do this invariably turn out to be bullies in some shape or form). A lot of those who do show up are spam-bots and are just a minor nuisance as they register and then never post at all.
On my last 2 sites I'm an admin so I use this site
where you use the person's email addy which picks most automatic fakers up, but the 'real' dupers I've known - one woman had 11
most of them simultaneously on the same site, all of them with a high post rate and once you knew what she was up to you could see who it was, just from the style of posts.
She was permanently banned, blocked and had all her account zapped (very unusual). She then turned up on our site (not the new one) and came clean on the duping side when our overseer spotted her MO and promised to be good. She didn't dupe but she drove the rest of us crazy with her crappy posts and then blotted her copybook yet again by plagiarising an article and trying to pass it off as her own. Last I heard of her she was adminning
on yet another site and still posting other people's work without naming sources
The thing I really hated her for was putting one of my best online friends through the mill when she was duping - she pretended to be a newbie and asked Fee (who was mentoring her) a load of dumbass questions that she knew the answers to very well in order to make her latest ID 'authentic