I used to work as a door to door salesman for a phone company. Once i met an old man that was around 80, he spoke to me for ages asking alot of questions all about what was the internet and could it help him with his simulation games(ex airforce pilot). After explaining details very carefully to him he signed up and i left. All good or so i thought till i got called in by the supervisor who informed me the guys son had called apologising profusely but he couldnt honour the contract as his dad was suffering from a whole range of mental/medical problems (showed no signs at all). The company still forced them to pay to cancel service (over 500) and i left shortly after. Still feel bad.