What would you do if you were published in middle-grade, but you had a hankering to write erotica? An adult noir? A cookbook? Would you be tempted to use a penname?
http://catherinestine.blogspot.com/2011/04/benefits-and-perils-of-using-penname.html
If it is a safety issue I would stick with a penname
I know I'm crossing the line a bit, but it's all good....As a writer of children's stories, I used the name Miss Elaney when I published a children's magazine years ago. I believe that children AND YAs "connect" and find relationship w/ creative names. My reasons, though for a different audience, still supported this philosophy. Since I was invited to schools to speak and conduct writing club activities, I preferred the students address me as students SHOULD address an adult....with a title of respect. Enter MISS Elaney, stage right. On several occasions, I was disturbed by the lack of respect young people show adults these days. Some would have the nerve to just call me "Jennifer," while others would actually say, "Hey!" My frustration drove me to creating this adult-friendly pseudonym and it has actally worked out quite well.