Banning by IP address - I can see this solving temporary problems (e.g. spammers) but in the long run does it work for keeping someone out of your journal? People can change IP addresses pretty easily - quite apart from things like home connections often changing IP addresses periodically (my ADSL does almost every week it seems) than between home, work, and the anonymity of cafes/hotspots/etc I don't think you have a sure way of keeping a specific person out while maintaining a public journal.
no subject
Banning by IP address - I can see this solving temporary problems (e.g. spammers) but in the long run does it work for keeping someone out of your journal? People can change IP addresses pretty easily - quite apart from things like home connections often changing IP addresses periodically (my ADSL does almost every week it seems) than between home, work, and the anonymity of cafes/hotspots/etc I don't think you have a sure way of keeping a specific person out while maintaining a public journal.