I wasn't saying that fuel filters cannot get blocked, I was responding to a poster who was worried about getting crud in his fuel tank from a petrol station that could block his fuel filter, and explaining it can't actually happen (any particulate small enough to get through the fuel filter in the pump and into the car's tank would also be small enough to get through the fuel filter in the car, so couldn't block it).Definitely not a myth. I've seen a filter so badly contaminated that it collapsed due to vacuum induced by the pump.