its nothing to worry about, anyone who knows your skype or to whom you've ever sent an email can see it, maybe if you have lots of enemies you'll get ddosed but thats about the worst that can happen
who told you ips cant be changed?
who told you ips cant be changed?
No one told him that IP can be changed ^^
OP no it will not cause you any bother the attacker having the IP's, s/he 'they' have more important things to take care of like trying ti get as many accounts before passwords are changed, Hopefully it has been annoying and when they have got some they try gain access but the password already changed that would be good but obviously they will get a few. Nothing to worry about with them busy bees knowing Ips' all they know is where you registered the account in question plus the last IP that was logged into said account. 
