As a guy who grew up listening to his wanna-be rockstar dad, it behooves me to throw in my two cents here and flame things up a bit.
Here's a list of bands/groups/artists-
Fleetwood Mac, Bachman Turner Overdrive, Lynard Skynard, Prince, The Doors, Jethro Tull, Queen, The Steve Miller Band, The Dire Straits, Tom Petty and the Heartbreakers, The Clash, Billy Idol, George Thorogood, Electric Light Orchestra, Jefferson Airplane, Deep Purple, Blue Oyster Cult, The Creedence Clearwater Revival, Aerosmith, Sammy Hagar, ZZ Top, Rush, Led Zeppelin, Journey, The Hollies, Grand Funk Railroad, The Who, Eddie Winter, Red Rider, The Eagles, Bon Jovi, and The Allman Brothers.
What do all these all have in common? Exactly two things. One, they are all part of the unwieldly massive genre of music known collectively as "Rock".
And two, because they're all more than twenty five years old and never sat around dicing up which part of spectrum they fell into, they're all thrown together into one big lump called "Classic Rock".
Now I love me some metal, as my Gigantour and Ozzfest shirts can attest. But while Metal is most certainly Rock, Rock is by no means Metal. You're arguing over which three identical groups of thrashing guitarists and screaming grumbly Norwegians are Black or Viking, and ignoring forty years worth of fantastic, wildly varied culture. I know this is to be expected with internet folks who play a game as mental as Dwarf Fortress, but come on guys, broaden your horizons.
And to hear such a venerable and storied field of endeavour as Punk described as "Pretty much every band a teenage girl likes that includes a guitar falls under this."... I hope you meet Sid Vicious some day so he can show you why they call him that. Then Mike Ness, Dex Holland, Jello Biafra, and Gregory Graffin Ph.D can take turns working over what's left of you. Philistine.
Just foolin' around there. Obviously, your exposure to Punk is limited to wuss bands like Greenday. But seriously man...