An unsubstantiated claim doesn't require a well researched counter. The suggestion to do research is just that a suggestion. I find that when dealing with posts written by people who are uninformed or have the intention of misinformation that it is important to point out that the issue is contested. If someone is lying then a bit of research will prove that and we can all be in agreement. If the subject isn't worth bothering with then my accusation surely can't be bothered with either.