We should re-evaluate the false positives with Special:AbuseFilter/24 . This blocked an Outreachy intern who was attempting to add a link to her blog about the project.
Perhaps we could only do Disallow, and not Block. I realize that does potentially risk vandals re-trying until they bypass it, but everything's a tradeoff. Or we could tighten up the regex to not match borderline cases that might be legitimate.
As is, it seems we risk false positive blocks discouraging newcomers.