I have recently joined a seniors only web site. Most people there are decent, rational people. Unfortunately, however there are 5 or 6 who are constantly in attack mode and they always make snide anti-social remarks such as, "The recent mass shooting in Las Vegas clearly demonstrates that Americans are only getting what they deserve".
One person, on that web site, is particularly nasty and will take any and every "thread" wildly off topic with some negative comment about the person who just posted. When I ask posters to stay on topic I sometimes get remarks such as "Why are you always trying to control people. Example : I started a thread on the film "War and Remembrance" The 1st reply I received was a rant on Isis, which is not remotely related to the WW2 film.
How do I handle such people ?