Use Your Words

In order to get this achievement, you must have at least one spectator in the game. When playing one of the minigames, have the spectator select any of the actual players answers (not a house one) and then select the Offensive! option and submit. When the game ends, it will then award the "Free Speech Ribbon" to whoever they voted for on the results screen. Rinse and repeat 5 times and after the 5th one is awards, the achievement will pop.

Source - http://www.playstationtrophies.org