It's really hard to ban IPs because it's not just one IP but multiple ones (thanks to proxies). I think everyone here should change their emails unless you're absolutely certain your personal info isn't connected to your email at all.
Here's a simple test you could do to see how anonymous you are:
Look at the email you're using, and type it into spokeo.com
The best scenario is for nothing to come up but there's no privacy on the internet these days so you may need to create a new email under a fake name.
If anything does show up, even if it's just your name, change your cz email as fast as you can, as anyone (and I mean ANYONE) here on curezone can request the password for your username to get the email, then look you up to find out everything about you.