I think we should be aware that outright atheists are moving into the churches as well. Yesterday two of Michael Medveds guests were atheists who attend a Lutheran church.
They never gave a real reason for attending church but I don't think their reasons are honorable. If I were to hazard a guess I would say that they intend to destroy from within.
The recent story of child molestation at a Baptist church in Louisiana uncovered satanists within the church.
Depends on the church body. "Mainstream" Protestant churches are resorting to attracting would-be members in with entertainment and Hollywood hooks, not the Gospel. The hope is that if you get people inside the church building, that somehow, some way, they'll be saved without ever hearing the Word.