What is a hashtag? Fifteen years ago (fuck, I'm old) I started documenting what Twitter's nascent hashtags could and couldn't do. Back in 2010, this is how the official Twitter site linked hashtags. Notably, punctuation symbols didn't "count" as part of a tag. How does modern social media handle something like #Fish&Chips? Mastodon links directly to #Fish&Chips BlueSky links directly to #Fish&Chips Threads links to a search for Fish & Chips What about normalisation? Should #Romeo…