I flagged this answer as not an answer, but my flag was recently declined with this reason:
declined - flags should not be used to indicate technical inaccuracies, or an altogether wrong answer
The question was asking what the purpose of the Tumbleweed badge is, and the answer says "to get a song stuck in your head" with a link to a Youtube video.
I guess that it can be considered as a wrong answer, since that's obviously not the purpose of the badge, but that's not why I flagged it. I flagged it because it was obviously a joke and not a serious attempt to answer the question. The intention of that answer was probably not to provide an answer to the question, but to joke about the badge's name.
Was I wrong in flagging this answer? Are jokes posted as answers really allowed?