Regardless, at some point, it was no longer a thing. And now, it is again. It showed up on the 10k tools new tag list this morning. I've been retagging questions out of it all day, but clueless new users keep trying to use it.
- Make it a synonym of asp-classic, which seems to be how most of the questions that used it today wanted to use it.
- Make it a synonym of asp.net
- Blacklist it so that users can't possibly pick it and get it wrong.
I'm going to suggest #3, as it has the least horrible outcome at the possible cost of confusing users that don't know that we call pre-.NET ASP "ASP Classic."