...or they're using some sort of keyboard that doesn't have an underscore key. Either way, I've seen submissions where what should be an entire phrase is split up into a bunch of different tags, and not even in order because of Weasyl's automatic alphabetizing.
Don't get me wrong; I like that there's at least official support for underscores, and I assume the search tool is smart enough to know that a search for, say, "five nights at freddy's" should include, if not prioritize, anything with the tag "five_nights_at_freddy's" as well as searching for matches for the individual words. But in practice it doesn't seem to be working out so well. And it's completely unnecessary when there's a much more obvious alternative: using commas to separate tags instead of spaces, and then treating spaces the same as underscores. And then, if you don't want to go through converting all the existing tags, you can just make it so that spaces automatically convert to underscores and back between the front end and the database.
...
And while I'm on the subject of tagging, I've been kicking around another idea: The ability to lump tags together to describe, say, a particular character in a picture. I'm not sure how this would work as far as coding, but if someone is looking for a picture of a black fox, or a male fox, or a black male anthro fox, it would be nice if they could at least direct the search tool in the direction of pictures that specifically contain those things instead of just those tags separately. Like, maybe they're looking for a particular piece but don't remember what it's called. Imagine if artists could punch something like this into the tags: "(black,male,anthro,fox,green eyes)" Then people who are looking for that picture won't have to hunt through pictures of female red foxes with male black wolves or something. They'll still be in there, but the picture they're looking for will get priority.