I see how it can be a murky area, especially if you aim to communicate with many. Unfortunately, HIVE is set up in such a way where "might makes right." Many times you're at the mercy of what people can do with their social influence or stake. So, the best advice I can suggest is to try and explain these things to hivewatchers before any blacklistings happen. If they want to regulate your behavior on the chain, then perhaps the onus is on them to tell you exactly what they expect and how they make their determinations of what is spam and what is not. Not saying you should have to cow to their whims, but once you find out what their deal with you is, if they are overstepping in their imaginary powers, then perhaps you can shine a light on that in your posting.