I'm totally with jonaj on this one. Its best to be totally honest with potential clients. You will save yourself a lot of trouble if you sensitize people as to what they are getting into. This will help then to be properly prepared as well as exempt you from future liability.
I would never like to be duped in this way or any other way for that matter.
No, I would just consider them when I'm comparing other properties. The vendors probably know all the faults anyway. My mother was selling her house. Well the prospective buyers pointed out that it was under the flight path... No kidding!!! I think they want you to reduce the price of the house after the faults are pointed out. I would think the vendors have already considered the faults, hence the price. Take it or leave it I say..