Bad: "Men are trash". Implies this is an unfixable state of nature.

Good: "Men, don't act like trash". Implies that men can and should do better than the patriarchal majority.

@LunaDragofelis

"If being a man is so awesome, why don't you act like it?" 

@LunaDragofelis Wil Wheaton: "Don't be a dick." 'nuff said, if you ask me.