How to remove your Comic Vine account
Acoording to the PP, you should contact them requesting removal of your account/data: https://cbsi.secure.force.com/CBSi/submitcase?template=template_privacygl&referer=privacygl.com
However notice, as is mostly the case, they may retain some of your data due to legal reasons. More info: https://cbsi.secure.force.com/CBSi/articles/FAQ/CBSi-Privacy-Policy?template=template_privacygl&referer=privacygl.com&data=&cfs=default#Access
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Comic Vine and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Comic Vine using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Comic Vine. Click here to find out how.