Tom and Betty have been married for 20 years, they have 3 lovely children. All of them use the same computer at home, all of them are enthusiastic and loyal members of Answerbank. Except that Harry, 17 sometimes posts daring rubbish. AB bans the IP address, even assuming it is not dynamic. Mum and Dad and the other 2 kids are blocked out and not happy. In addition, Dad sometimes posts rather salacious stuff from the public library in Luton. AB bans this IP address too. Good strategy don't you agree.