You have dodgy people in all communities & areas their not confined to the one area, I would be more inclined to worry about the one asking that question.I have been in the Brighton community since the early 80s. Since then the education system has taken a deep slide & regardless of all the new facilities there seems to be a shortage of securing qualified staff.
I don't think Brighton is considered to be a "dodgy" area. Its pretty safe. The thing with Tassie is that because it's such a small area you can have really good suburbs right next to really dodgy ones. I can't comment on the school there but I would consider living there and sending kids to private schools in Hobart if the school wasn't great.