Drivers of Harley Davidson motorcycles already face an earned stigma as being balding accountants trying to reclaim their manhood by riding chromed-out motorcycles while wearing West Cost Choppers paraphernalia. This guy turns the poseur-factor up to 11 with phony tank-mounted iPhone.
To quote @Edmunds_Test, who captured the image: "[The] only thing worse than a Harley with a tank-mounted iPod is a Harley with a fake tank-mounted iPod."
Words describing levels of tackiness haven't reached this degree yet so we need to invent them: tackytacular.