I used to do this many years ago when I was younger. Back then I was always smoking on the go as I couldn't do it inside the house, so joints were perfect for just grabbing a few, and heading outdoors for a bit.

I haven't done it in many years though. I found myself tearing open joints to load a bowl or bong hit. Sometimes a joint pre-rolled was only big enough for myself, so I'd have to burn 2-3 if I was with friends, or, if I rolled up a few big ones, I found myself taking them apart because they are too big.

So simple yet so complicated, so I don't bother. If I want to roll one, I will. Shit, it only takes like 2 minutes to spin one up, and if I want to pack a bowl, I will.

I also found going to a party, I sometimes liked to match people and get 2 or 3 different kinds of weed in one joint. I've always liked doing that, but having them pre-rolled, I found myself burning one after another and no one else putting in. I like a mix in one joint rather than 2 or 3 seperate joints.

Oh, and .2 of a gram isn't even worth rolling up. You'd be smoking more paper than anything.