I have plenty of guesses, on the other hand, for the downvotes:

1) divisive langauge - there are those who "I think have their heads on straight" and everyone else, who is suspected of wrongdoing. probably more offense at being suspected than desire to behave brutishly

2) attempt to assume authority and power - unless your position is secure, or your proposal compelling, people will tear down and mock the young upstart

3) interpetation of "i think we should do this" as a call for votes

4) actual rational disagreement