Thank you for the great reply and questions.
Yes, introbot does try to first educate and then warn more aggressively. The author has to pretty much ignore or simply defy multiple notifications. Once it starts downvoting, it uses stronger and stronger SP to get them to change their tag selection. It is very effective in the end.
The posts that no longer show are a result of introbots and/or byColeman downvotes, causing the authors post to be hidden.
When someone with a higher reputation than you downvotes your post, it effects your reputation negatively. If a high enough downvote power is used, the post may become hidden.
And of course welcome!
oh, now I understand a little bit more. Thanks!
Glad to be here on Steemit.