If you disagree with someone, please succintly state why and let it go at that. Point, counterpoint, counter-counter point, etc. is not useful-- the reality is that after the first disagreement, you will rarely convince another of something they feel strongly about unless you have shocking new information to share. The drawn-out debates also turn people off from reading the messages in the first place. If you really have to get something off your chest, please send that person a Private Message-- there is no need to have a long argument in public.