Is a screen not needed for a pipe?

[hempy]

umm and just so you people know, just take out the screen when it starts to get clogged and burn it with a lighter for a little while. then just brush it off and the shit should just fall. thats how I do it. but you could just dip it in acetone or boiling water. whatever you think will get it clean. and you can buy screens for like 20 for a $1. or i can. lol

also HEMPY you are dead wrong about how screens hurt pipes. I've had this one glass pipe since I started smokin and I've always used a screen in it. becuase the hole is too big and it spits through.

No, metal against glass will scratch it. And will cause it to not live as long.
I live in the land of glass blowers... Trust me I get lectured about glass handlings all the time but they still give me free glass. lol