Nothing wrong with that, provided you pick the right place to do it. Showing scenes of torture on such a catch-all medium as posters, as Amnesty International has done, suggests questionable judgment, and it's no surprise two major outdoor operators have refused to run them.
Editorial: There's a time and a place to shock
With so many charities vying for attention, the temptation to run advertising that features graphic images just to shock people out of their complacency is overwhelming.