Traditionally proxies fit this bill – adding a barrier between yourself and your deeds much like the infamous “glove box” that stops scientists spilling nuclear stuff all over their fingers. If you are doing a ton of stuff and need a lot of different IP’s second to second, in an automatic style this is probably your best bet, as proxy’s are easy to mess with in code.

Something I have always done though that as I see it has been widely missed or unacknowledged at least, (I am not sure if this is a uk specific thing or whether it counts for all ISP’s) is abuse my ISP.

What I mean is that unless you pay extra with your broadband for a static ip address (likely if your hosting your own) then you are automatically assigned an IP address when your router connects to the ISP. So literally to get a fresh IP address (and I mean completely different – if your with BT for example they have millions to hand out) just disconnect your router and reconnect.

It is physically that simple. I haven’t bothered automating this (although sure a little router hack script would do it simply) but it does work for me – perhaps theres limitations I can’t see – and it doesn’t help if your doing really naughty shiz cos your ISP will still know you.

Still – Widely underused if you ask me