Thomas Shey
Legend
The problem is, of course, almost no one sets out to pull a thread off-topic (though note the "almost" is doing some lifting there); they intended to make an often minor side point. Then someone responds to it. And they (or someone else) responds back. And the side topic starts to enlarge. And pretty soon you can end up having a major side-trail going on that no one at any point really planned on, and some may well have forgotten what the original thrust of the thread is.