Basically the only thing I think is important to reiterate, which has been touched upon here, but maybe not as clearly as I'd like:

anyone can change the community tags, if you don't like that it's tagged as spam change the tag.

Don't be stupid and get into a war to change the tag back again if someone changes it back to spam. Or, I mean, do. But then you're not going to have any time to spend interacting with the actual community - on the other hand, if any person is that pedantic about how they want posts to appear tagged, I probably should be thankful they are removing themselves from discussion via becoming obsessive about tags.

Sometimes I get drunk and like to shittag things. I only tag "spam" if it really truly looks like spam, and am I a drunk asshole? You bet your Pinacle Whipped I am! That happens to be life, though. At any rate, the invisible, pretend internet damage is minimal and easily undone. Instead of asking everyone to do something the way you believe it should be done, just...live by example. Besides, there are going to be new people here all the time. Even if you got the whole community to agree to doing something one certain way (yeah, good luck with that), you're going to have to have the same discussion tomorrow. And the next day. And the next.

Save your breath. Change the tags.