Is it ever OK to tweet a derogatory word? How about offensive names in a post to a friend on Facebook? Or texting a racial slur? Most young people think it’s all right when friends are joking around with each other, according to a new poll. Seventy-one percent say people are more likely to use slurs online or in text messages than in person, and only about half say they are likely to ask someone using such language online to stop.