I agree that OT posts clutter up the board. From a newbie's perspective, it's challenging to read through several thousand posts, 20% of which it seems are OT.
Well I don't know if it's as high as 20%, but we do try and keep things light from time to time. We do go OT once in a while (can't take ourselves too seriously you know).
I felt my note the other day was necessary because that thread was getting too specific politically (me included) and over the years we've been pretty good at avoiding all of that.
I can relate to your 'newbie' task. I was in the same boat 12 years ago!