I've just attempted to submit a question to
meta and forgot to put any tags on it. I added a single tag and re-submitted and was told that I needed to add one of a specific set of tags. I added this and re-submitted and was taken to captcha.
Is this by-design? I wonder if any newbie users have been put off answering questions due to a 3-strikes-and-you're-out reaction? i.e. "this site has just prevented me from posting 3 times, I can't be bothered with it."