How Stupid Were Metalheads Back In the Eighties

[The Batlord]

This question is mostly for the oldies who were actually there to see this time period. Alright, so we've all seen the kind of be-mulleted dunderheads that inspired Beavis and Butthead in documentaries like Heavy Metal Parking Lot. The kind that just make you cringe, knowing that their intellectual mediocrity has been preserved on film for all of mankind to deride. But these days those types seem to mostly populate the Juggalo movement, or maybe the deathcore scene. Metalheads just seem to be nerds more than anything else now. So, with whatever dynamic that existed back then seemingly gone I've never really known just how true the stereotypes were, and in what proportions. Would the vast majority of a crowd at a Slayer show in the mid to late eighties have been made up of morons? Fifty/fifty? Would I have been embarrassed to be seen with these people?