It's obviously fine for work, at least it had better be! Otherwise, we're all going to be in big trouble! Well, I wouldn't be there anymore since I'm out of that job now. Whew! Thank goodness I dodged that bullet!
I still don't actually know what that sticker means. Normally, whenever I don't know something and state such in the comic, I'm pleasantly surprised by emails providing me with some knowledge on the topic which eluded my education.
But in this case, I don't want to know! Unless it's a super interesting sticker, I'm sure that whatever I assume it means it way cooler than the truth. Seriously, I don't have a non-fact based faith to help me through life, let me have this one thing!