Well, one shop certainly found a way to ensure I never ever buy from them ever again.
They fitted that Mosquito device designed to stop kids hanging about outside their shop.
As I walked past the shop, a gigantic bee decided to start drilling my ears with a rusty dentist's drill. Through a megaphone. Through another megaphone. Through a PA system.
That's the equivalent of the next PC World ad using the Voiceover: "Hey, you ignorant little bastards with no knowledge of computers. Why not buy from us so we can rip you off after waiting in line for three hours to speak to an advisor who hasn't yet learnt what RAM is."
Ouch. Stupid shop.