Comments by "Matuse" (@Matuse) on "Real Lawyer Reacts to Batman: the Animated Series" video.

I think the issue with the vigilantism is that Batman acts under the color of law, so his penchant for breaking and entering would result in evidence being thrown out for being obtained without a warrant. Obviously we don't see the trial to know exactly what the issue was, but that could definitely be an issue if the principle evidence against Poison Ivy had to get tossed.
1