Plumbers, electricians etc who say that they're happy to come out and give a quote for jobs but then never turn up.
People who park across the end of driveways and then bugger off so you can't get out.
Waiting in for delivery of a parcel, not daring to even go into the back garden in case you miss them, but then finding a card behind the door saying "Sorry we missed you, your parcel has been sent back to the depot, cal 0800 ** to collect it".