How would that work on a static site?
Would I need to run a (tiny) service that accepts incoming webmentions and then expose those?
How do webmentions deal with spam?
We had "pingbacks" back in the day. They were abused by spammers to get backlinks to their vi@gra, rolex, etc websites. My blog got thousands if not more per day of these pingbacks. Has webmentions solved that?