as someone who has a very underground record label, i'm pretty familiar with DIY t-shirt printing. i think the one thing you should note with this kind of operation is that it only really works with light colored fabrics. for darker shirts (white on black punk-t stuff) you have to screen upwards of 3-5 times for the image to come through... meaning that you have to have a very precise (probably mechanized) alignment system in place. if you're printing on white or light shirts though, this is good to go, and shouln't be that messy or hard to do (as above commenters are insinuating). the key, as cor3y notes in the instructables, 1: is to use a 150 - 200 watt bulb, 2: realize that you will have to expose the photosensitive emulsion to the light longer as the bulb ages, and 3: note that the emulsion has a shelf life, even in the fridge, of one or two months, and loses efficacy after that. Light colored tees is also key. this is a full afternoon project, but don't be discouraged!

i worked at a (now closed) video store when i was in college - Major Video in NOLA, for you southerners here - and they ended up being brought to court for similar - ridiculous - obscenity charges. the way i heard it, a jury in baton rouge was made to watch hours and hours of their most salacious inventory. i don't know if it was the aesthetic maturity of the midget smut or what, but they were ultimately let off the hook.