I think it was more along the lines of "shotgunning messages to any women in the area who will accept your connection." If you were hitting on all the women in your office I'd expect HR to want a chat.

I would say not necessarily bad, but definitely risky. Because if it goes south then it could easily be a bad situation for everyone.

It's not bad to find dates in the office. It's bad to message people on LinkedIn with the specific intention of meeting with them for non-professional reasons. There are other, non-professional networks for that.