Theresa, I don't know that it's really the best idea to be telling people to panic. It's like so many people have already said: Miami is on a Sunday night. That's a really sucky day for it to be on. That said, if you look at the ratings for Hawaii 5-0 (the show that is currently in Miami's old Monday night spot), they're not much better than Miami. In my opinion, this bodes fairly well for Miami. I mean, think about it. Miami has been on for ten years. More than that, it got moved to Sunday night. If I'm not mistaken H 5-0's rank last year was a brilliant 22 with nearly the same number of viewers is Miami. Given that Miami had over 16 million viewers its first season (and a ranking of like 12), I'd almost be more worried about H 5-0. If CBS were to switch Miami back to Monday and stick Hawaii on Sunday, I can tell you with absolute certainty that Hawaii would die and Miami would (especially given the better calibre of episodes this season) do much better than it's doing now.
That said, instead of being negative and telling people to panic, perhaps you should consider affecting change in more constructive ways (i.e. contacting CBS, buy your own ratings box deal, etc)