Experience tends to indicate posts of this nature lead to thread drift and/or agro.
Why is thread drift a drama? It happens as the discussion moves and progresses. If those that are interested want it back on the original topic it can be moved across. If not then the 'mob' has spoken about the direction of the thread. Recently a thread regarding J* advertising drifted into the usual fair of transparency in accounting. One contributor puts up some false logic discussion points and gets rebutted. The discussion is subsequently closed down. What harm is done in the drift? There was no agro, there was no animosity, there was no name calling.
So just to confirm. Thread drift is now verboten on PPRUNE?