That says a bit about officer status honestly. Make sure you know your officers and that all other officers believe in them too. That's a powerful rank, so you should never give it to anyone you don't think won't help make the guild better and be responsible.

However if this person acted nice, responsible, etc, then that's really a shame.

Name and shame is typically more of a per-person basis, as the idea behind it is to prevent anyone from being harassed in-game over something trivial and making a hostile environment. Might want to change your wording to "someone who appears to be affiliated with this guild" as there are only so many guild masters per guild.
If you're trying to say "hey, all you members of tinkering gremlins, you can come back now" that's fine. File a complaint about the player in question, and move on, and reword your post a bit.