I have to admit, I don't think that's a great bot duty. I think @fingersik's post is an appropriate use of the tag. Ultimately, as fun as many of the bots are, I think there are far more of them than necessary. Randowhale is easy money, but not actually of additional value. The bots that welcome every user are not actually adding value to the system, and, while I enjoy steemitboard itself, getting a notification every time I "earn" an award isn't necessary (and I know I can command it to stop, but I'm also playing the game).

The game isn't very broken, but it is a little. I think we should be very conservative with our acceptance of bots. Ask yourself, how much value does this add? How much effort will it cost everyone who reads it? And ask, not for the value of your own account, but for the value added to the whole system. We rise together, we fall together. (Except for those who take advantage and rise on the backs of those who are trying to help the whole rise)

Your bot does not explicitly say that it is reminding people "the use of IntroduceYouself tag is not to be used for other purposes than Introducing." Or at least, it didn't in that particular usage.

"broken" isn't exactly the right word, but there are elements of the prisoner's dilemma at play.