Ehh, I really don't support this. Scarborough Town Centre is really a node, and I think most trips will either be terminating there or going there from busses, and then taking the B-D or Sheppard. I think it'll be a very rare case that someone'll loop around, and if they do, it'd be much better for them to simply wait than put both lines into jeopardy by making them unmanageably long (for such little benefit.)
And Fresh Start, I take offense to your comment about the nonsense that goes on in my posts!