Try not to worry. I think CW expected the ratings to fall a bit with the slot change, but they are not going to abandon the show with Smallville leaving.

SpoilerTV's Cancellation Predictor table (updated per Nov 11) shows Spn as "looking safe".

I don't suggest you stop drumming up support, I'd love to see more appreciation for our show, but don't panic!

Also, little known fact - fandom, per se, is not the bulk of the viewership. The larger portion of viewers are folks that just turn on the show, and don't obsess on it over the internet. ;)

The haters need to diaf. :)