Lately, I've been seeing a lot of bug reports on different meta sites that were by design. Some of them did get the status-bydesign tag added to them. Many others got edited into support questions since they are not actually bugs, but I've always thought that was what status-bydesign is for.
I see many new bug reports here where the user clearly isn't familiar enough with how Stack Exchange works, and have no objection to retag them as support. (Very recent example.) Technically, this conflicts with the author's intent, since a bug
Indicates a reproducible problem on the site that you believe is due to a mistake, malfunction, or programming error.
(emphasis mine). However, it's clear that they're actually support questions (at least most of them). Retagging them saves Stack Overflow employees some work; they tend to look at all questions tagged either bug or feature-request.