Being quite new to MN, I've noticed the following phenomenon on some threads - usually when opinions are sharply divided.
Poster A makes a point.
Poster B disagrees.
Posters CDE etc suddenly arrive within a few minutes declaring total support and praise for one of the points of view. They then float off and don't appear on the thread again.
I'm wondering how many aliases people use on here and what is the name change etiquette?