Thank you. Its just putting into practice the old addage that you shouldn't wrestle with a pig.
In person, there is a long time honored method for dealing with people who lack character, while casting dispersions on another's. But on the Internet, any ranting clod is safe from such repercussions. The beauty of it is, you can pretty much thoroughly ignore them, once identified, just another type of junk mail.
A rational man would rebut any posts calling him a liar.
-- Which of course would mean he would have to find & repost those alleged comments. -- Which cannot be done, as they do not exist.
As we see, any "ranting clod" on the Internet can claim 'liar, liar, pants on fire', -- because they've failed in debating the issues.