I think this is terrible advice, an intervention like this will probably be perceived as hostile. — reinierpost 44 secs ago

Another +1 for the therapist suggestion. It doesn't even need to be a couples therapist, each one of you can have their own therapy session to help build awareness and coping strategies. — Juliana Karasawa Souza 1 min ago

maybe this question should be deleted and this one migrated here: lifehacks.stackexchange.com/questions/22475/why-so-serious — virolino 32 secs ago

I agree with this answer, but I think the approach should be "just the facts". Don't make it about throwing the PM under the bus (although that's the desired result), make it about "here's why the this problem occurred, here's why that problem occurred" and make it factual. Let boss A conclude that B screwed up. — DaveG 1 min ago

Good answer :-). One nitpick: I don't think touching someone and waiting for them to complain is necessarily abusive behaviour. Things like that depend on the circumstances - for example, if it's very crowded, or if someone is very broad/tall, touching may be hard to avoid, and possibly even expected on public transport. In the end, it's all about conventions and expectations. In borderline cases like this, unfortunately you cannot rely on people respecting your wishes if you do not state them clearly. — sleske 1 min ago

For those who don't get the reference: This is a quote from "A Storm of Swords", from the "Song of Ice and Fire" series by George R.R. Martin. — sleske 1 min ago

Yes, exactly. I just meant that whether or not the person is "mean" is sometimes a judgement call - and as Hanlon's razor says, "Never attribute to malice that which is adequately explained by stupidity." (or in this case, lack of attention). — sleske 1 min ago

What have you tried already? I assume that you've asked him to vacate at least a few times over the course of 5 years. What does he say for himself? Is he barring you from entering the shop? Does "calling the police to get rid of a squatter" qualify as legal action? (I tend to think of "legal action" as being a law suit, but maybe you meant it differently.) — Steve-O 1 min ago