It wasn't annoying. It was merely disappointing because I was hoping that everyone I was having a conversation with had actually bothered to write up a reply within a single night! Coming on to 6 at one time is rare, but 6 over the course of half a day is not. I'm very good about replying to any messages I get.
I've done that to other members myself because I was really excited about something they were doing! In fact, I most recently did it back in March to Pokestick, Good Times.! I was giving them art direction on their fanart of a series I am a fan of. I was a mod back then and still am now!