I wouldn’t recommend that - ideally you’d flag the posts. Which maybe as a new signup you can’t - but for that, I’d say don’t try to fix the whole internet! Flag bad posts on the forums you regularly use.
I do agree of course that this kind of spam, and most spam, is annoying and takes up community time and moderator time. A central clearinghouse of bad patterns might be an idea. Or, possibly, central barriers to access and account creation might help: stopforumspam is already a free-to-use public repo of bad accounts. The likes of CloudFlare might well block the bots or the IP addresses which are acting badly.