Did this take place in the '80's?
Reasons: Old TV with old remote. Cable TV, not satellite. Easy to steal cable (not like now). Old looking programming on TV. No cell phones. No computers. All the cars looked 80's. 80's era Heavy Metal (dominated by Metallica). Phone, with a DIAL that actually rings (with a bell). Hesher looked like he came straight out of the 80's.
If so, why? Maybe the director was inspired by events from that time.
I could be wrong, but you don't see a movie these days where the characters don't have their faces glued to a cell phone at least half the time.
Unc John "We makin' trouble?"
Stacy "Yeah"
Unc John "What kind?"
Stacy "...The forever kind"