There's a few ways of spotting the paid comment makers. One is they generally go for ad homenum attacks. This one is an antisemite, that one is an enemy of Israel, this one is not qualified to speak. I also find it amusing that Noam Chomsky is considered not qualified to speak because his PhD is in linguistics but Alan Dershowitz, a trial attorney, is even though Chomsky is just brimming with relevant facts and Dershowitz is so clearly a manipulator. They are not too educated these commenters.
Also, they also never respond to educated responses because they have no response and possibly they are instructed not to respond so as not to help promote educated thought on the topic.