For one, so many Internet trolls are just underage kids with little to do other than belittle the outside world, and I can't imagine that MTV or law-enforcing agencies would be down with Catfish bringing the Internet's vengeful ire down upon a pissy 14-year-old honor student whose parents run the local yacht club (or whatever). As well, even if the research is done so that they're only going after adults, that doesn't immediately make things sound easier to accomplish. Considering all the hubbub that went down over that dude that created the "Donald Trump DDT-ing CNN" video, does anyone really think that other trolls will just offer up their names without a fuss? I expect lawsuits.