Rear coilovers on front shocks?

yeah, really stupid question, but I'm just wondering.. for the hell of it, I got 2 sets of coil overs at home, skunk2 and Tein. I was thinking about slamming the front, by putting my skunk2 coil overs on the back and putting rear Tein coil overs on the front... I seen people around town doing it and the front end was REALLY slammed. I know Its really hard on the shocks, but will the coil overs rub on anything ? Since the rear ones are wider than the front ones.. Anyways im not planning on leaving them on for long.. But my question is.. Can I do this without the coil over rubbing on tire/control arm/ANYTHING ?