What this is, is "extortion", or more correctly "protection", at least that is what the Feds called it when Al Capone did it. ("Real nice business you got here, palie...same if anything should happen to it.") No, actually, what this is, is a third party boycott called for by a corporation, an apparant felony violation of the felony provisions of the Sherman Anti-trust Act. Though labour unions are exempted, other corporations are not, though I'll admit not knowing as to whether this group is so constituted in Ohio or any other state, nor if they hold 501c3 status.
But it's not only a felony to commit such an illegal act, but to solicit one as well. Let's see if the Ohio prosecutors and Attorney General know the law, and enforce it.
-archy-/-
There's really no problem for the average citizen visiting downtown Cincinnati. If you happen to venture north of LIberty Ave then you are in a no-man's-land, but that's painfully obvious, so who would do it anyway?
The problem is that the convention bureaus in other cities are being swayed by the lies from the Boycott group and the City Council/Mayor are failing to rebut this. A good PR campaign by the Council could likely sweep most of this problem aside.