For example, suppose someone said in an article that the moon was made of green cheese. No, it is actually made of rock. This was confirmed by the samples taken during the 1969 landings. This is a correction , not a flame . Now that is a flame .
Flames are all very well, but often the disagreement is either an opinion or an obscure fact.
Then some other people join in, you respond, and so on. In no time at all, a sensible and useful discussion group degenerates into mayhem.