I believe it's wrong to kick anyone out of a cab for their sexual orientation, but on the other hand if it was a display of "affection" that was distasteful, that should be mentioned in the news article and to the public.

I also apply this perspective equally, that is,heterosexual couples who grab each others ass and swap spit publicly are also doing something distasteful, that type of behavior is intimate and should be done in private. It should be a reaction not to the sexual orientation but to the behavior, and even then the main issue in this case is making them exit the taxi on an interstate. Personally if their behavior was extremely lascivious I would have driven them to the nearest Hotel and let them out