Hello, and good to meet you.
I can’t get to your proposal for how to make the accusation without stopping first at the question of whether it should ever be made. No matter how well-balanced the method, I’m not convinced that calling a troll a troll is the best way of dealing with them.
A lot depends, I think, on why we’re (almost unanimously, at least, I think) agreed that trollery is a bad thing. The registration agreement defines it as being “purposely inflammatory”, and the Pit rules refine that a little, saying that being inflammatory just to enjoy the heat, with no intent to advance the discussion, is what’s meant. So intent is key. So is the post’s target: if the purpose is to provoke anger directed at some issue or institution or public figure or private miscreant or even another poster, it’s usually got a place in one or more forums. If the purpose is to bask in outrage directed at one’s own naughty self, the powers that be bring out the hook. A lot seems to depend on whether the poster bothers to weave any actual facts or argument or cogent opinion relevant to the thread into his general participation (I certainly couldn’t meet that standard in every post, and I’m still here), and whether s/he seems amenable to Moderation. Even these are poor substitutes for actual telepathy, which is why there’s usually quite a history of misbehavior to view by the time the ATMB thread shows up.
We’ve been told to just ignore them so often, and been given excellent reasons for it, that everyone can accept that this is the best approach. The idea, I suppose, is to deprive would-be trolls of the attention they seek (that’s assuming that’s their intent, but it’s a decent assumption. I’ve known children who would continue to misbehave if ignored, taking delight in their “invisibility,” but not many). We’ve also seen this approach fail often enough to be reminded that irritation can overcome willpower. Also, the diagnosis is sometimes not immediately obvious, and posters will respond as they would to someone who deserved their attention. It might soon become evident, but by that time the blood pressure’s up and the brain has manufactured all sorts of devastating put-downs that it would be a crime not to use, and we’re off.
I frankly don’t think the ability to call a person a troll would have a positive impact. The word is no more or less cutting than any other, you can report posts without using it, and it continues to bathe trolls in attention.
In fact, your proposal might make trolling more attractive by making it possible (if unlikely) for a troublemaker to actually get someone suspended or banned if they can bait them into an accusation and then avoid the hook themselves.
It also puts far too much of the wrong kind of pressure on the SDMB administration. Should Popular Poster X, with a hundred thousand polite and helpful and friendly posts, make an accusation, the administration is unnecessarily forced to consider (at least after the fact, in the Pit) board politics instead of taking action on their own. Since the formal accusation isn’t needed in the first place to accomplish the goal of removing problem posters, it’s pretty much all downside.