Can Members Disagree with Leaders of The Church of Jesus Christ of Latter-day Saints?

Some people think that members of The Church of Jesus Christ of Latter-day Saints are controlled by their leaders; that we are kept in "lock step" and denied the opportunity to express our individual opinions. If this were true, I'd sure be in trouble since I have lots and lots of opinions on about everything!  But what about the people who where shouting their dissenting vote yesterday in General Conference?