Don't be fooled Laz, like everything fashionable, RatRoads are already starting to be driven by greybearded men, and some shops are building them, putting extra attention on the rusty look for $$$. They are usually easy to spot : sparkling engine, with rusted exterior and even faded nose arts.
Even the youngsters that I met driving them, have not much of a clue of how to build them. They are pretty much like me, book worms that cruise the internet for the config they want, then ask a mechanic friend to hook it up. It's far from the original sunday wrench monkey in rollover tee shirt that wanted to look bad ass.