I politely disagree. The derailleurs with integral hangers brace against the dropout nicely, and the anti-rotation pin can couple with a top-hat nut (usually come with them) or conventional nut and washer, behind the dropout. You do not have to drill a hole in the dropout for the anti-rotation pin. If you have a good eye and steady hand, you can weld a hanger tab on any standard dropout. I put one on a BMX when I was a kid, and made a 7speed BMX chopper that worked nicely.
New Schwinn Wayfarer 7speed cruiser with integrated-hanger r.d.
Originally Posted by The_Aleman
Sure, I'm familiar with those. But that bike pictured never had one mounted, and if you were to mount a hanger like that, you'd compromise the strength of the dropout. That bike pictured is more suited to internal hubs.