Quick thoughts...

For every successful preacher out there, there are scores of "Christians" attacking him and calling him a heretic. If someone is truly a false teacher, then that will come to light in God's time. Ripping each other apart over doctrinal disagreements hurts the entire body. I'm all for open discussion of doctrinal issues, be they major or minor, amongst the body, but terms like "heresy" and "false teaching," while they may be technically correct, imply that a preacher is deliberately and maliciously distorting scripture. Often, the false statement is simply based an incorrect interpretation of a few key verses. The preacher who made the statements should be gently corrected in private rather than publicly lambasted. Or conversely, we can share our thoughts on specific teachings without openly mocking or deriding those who spread them.