I don't like the lying but the best thing to do is just ignore them.
This is as wrong as it can be. Ignoring them lets their lies permeate the public, and the public makes bad decisions based on the lies they have been told.
When Hitler was preaching that the Jews were "Untermenschen" and that greedy Jewish bankers stabbed Germany in the Back, and that Jewish Rabbis drank the blood of gentile children, the people heard it and believed it.
Ignoring it didn't stop the evil from spreading. Only confronting it can do that. You must reach the people with the truth, and you must challenge lies in front of the people so that the people are not misled by evil and falsehood.
"Ignoring it" allows it to fester and grow. It allows it to damage the nation and the people. Only fighting back against it with at least equal ability to reach the people can counter act it.