Well, the funny parallel to cafe racers is that so many bicycles out on the road today are an attempt to imitate vintage track race bikes... "Fixie pixies" are in a way, already the cafe racer scene of the pedal bike world. (And often brakeless, too, like the track bikes after which they're patterned.)
This scene also has its share of riders on unsafe bikes which they don't know how to ride properly...and may not care too, since it can sometimes a case of material fetishism and cultural conformity more than actual, deep-seated enthusiasm which drives someone to ride a bike like that.
Not to say all riders on fixed-gears fall into that category, mind you. Nothing wrong with the bikes, inherently, if properly set up for the street, or anyone who rides them. But as a "scene" grows, dumb things happen.