User blog comment:Kylie Jenner's Secret Baby/Leaving Fandom/@comment-173.59.60.144-20200816124425/@comment-24258073-20200818080956

I am almost certain that your request will be declined, since global blocks are not issued on request. They are almost, if not always issued against the recipient's will, unless the recipient was explicitly trying to get globally blocked by breaking the Terms of Use.

You could however request to have your account globally disabled, since disabling your account can be done voluntarily. Either by requesting to have your account disabled early through Special:Contact, by using Special:CloseMyAccount to have your account closed in 30 days, or by claiming to be underage.

I'm pretty sure when you say "globally blocked" what you're asking for is to be "globally disabled". However, if you don't have an account it won't be possible to disable your IP address.