surely details like name and address (however specific or unspecific) would be covered by the data protection act 1988 (or is it 1998? i forgot) and so by posting such information you would be breaking the law. i may be wrong. but i wouldnt take the risk either way. warning other window cleaners who work in the area is one thing, but posting details on the internet isnt fair on the customers - even if they have been unfair to you.