Yeah well, those Rick Warren books are catching on even though no one in the news paid attention to it. And if you ask me, it's not worth the attention it's getting either. In fact, Purpose Driven Church has done more damage than good.
The only thing you can do with heresy is to confront it with Truth. People who are going to believe it are going to believe it no matter whether you talk about it or not, because they don't know and believe the TRUTH.
How does one prove the truth?