I had a run of dead pixel screens from laptopscreen.com too, but they did send out replacements and pay for return shipping. They seemed to be the only large place in the u.s. that had a no dead pixel gurantee and backed it up without issue. Lately all the screens from them have been fine.
I asked them if they check them for no dead pixels before shipping, they said no. They also said I could ask to have the screen checked before shipping, but that wasnt an every order deal, just after recieving a screen with one stuck pixel.
We use them when we can, I just think dead pixel policies are a joke. No ones gonna buy an 60 tv and accept 1 to 3 dead pixels, laptop screens should be no different.