DON'T DO IT!!! The last thing you want is for a hot light to fall and injure someone. Go on Ebay and bid for C-stands. There is a company that sells them relatively cheap. I've bid and won C-stands for $45.00. If you are in NY or go on their website at Adorama (adorama.com) and they also sell used cheap lighting stands. Don't compromise in this area. You will thank me for this.
I build everything myself that I can, and after many attempts at this, I agree with Ernest. I've even retrofitted worklight stands to be higher and attached a boom. Even that is a big stretch. They just aren't built for that kind of thing. I've just recently gotten a 9', air cushion lightstand from Amvona through e-bay for about 30 bucks. If you don't mind waiting a while, the are a good place to order from.
It doesn't hurt to have them I guess, but in my limited experience they have not prevented damage to anything. They just collapse more slowly. But my lights aren't very heavy either, so...