Like Whitey, I am 100% in agreement with Shadowfax.
There are some websites (City Data comes to mind) that have forums and sub-forums for every possible topic–including auto repair. If somebody want to discuss…politics…the environment…history (all of which are some of my favorite topics) or anything of a non-automotive nature, there are many other places where those discussions are more appropriate than in a forum called Car Talk.
This forum is not called…Talk About Cars and Anything Else That Comes to Mind.
It is called Car Talk, plain & simple.
I think that the narrowly-focused name of this site explains the issue very clearly.