oh jesus this thread sucks. I think the original useful response was sarcasm, but here we go...

you can indeed thread a track cog onto a road wheel designed for a freewheel or thread-on cassette. this is called a "suicide hub" because you are running with no locking, a few good skids potentially *could* throw off the cog, leaving you to fall to a bloody, tooth-lossed mess. however, with brakes (to minimize backpedalling) and some red (uber-permanent) locktite you can be pretty sure it will never happen.