VPNs/open proxies are even more commonly used abusively so will also be blocked on sight (there are even bots that do this).[1] But again, this is a non-issue since, again, you can just register an account.
Editing without logging in is setting you up for failure anyway (and honestly I think WP should join every other site on the internet in requiring an account to edit; it doesn't even require an email). Just request an account. (https://en.wikipedia.org/wiki/Wikipedia:Request_an_account)
[1]: https://en.wikipedia.org/wiki/Wikipedia%3AOpen_proxies