I have to say that I am with those people such as Hollowpoint and Howi above. In fact I would go further and say to those people who want to shut down topics they don't agree with, "Who are you to tell me what I can and cannot read or discuss – I am perfectly capable of making my own decisions in this respect."
In fact, although I have not read the particular thread to any great depth, I did find some comments about rifling to be of interest.
Tomato plants, financial surnames, philosophical maxims (whatever they are). The first has no interest for me, yet I was surprised somewhat all the different varieties so maybe I have learned something. The second, was just for fun, and I see absolutely nothing wrong with that. The third, well, I can't remember reading it, and doubt if I would understand anyway.
But, may I say that from what br has said, or rather what his good lady has said on his behalf, he is confined to a wheelchair and possibly physically helpless as well, yet his brain appears to be functioning satisfactorily. Now, I can't imagine being in that situation myself, or rather, I would find it extremely frustrating to be dependant on my wife as br appears to be. May I therefore request that we cut br a lot of slack, and accept that this may be the only way that he can prevent himself sinking into that dark pit of despair. I don't care if the topics he introduces are only vaguely engineering related – it's more important that we assist him to keep his spirits up.
Cheers,
Peter G. Shaw