Short version: they looked a lot more like 
than 
. Most accounts of Vikings that are contemporary of the centuries where shield-Danes and spear-Danes went "a-Viking" describe distinctly hygenic people that bathed and took care of their hair (and wore it long).
EDIT: I thought I could have a little fun with a very loosely associated Beowulf reference to Danes (and even more loose associations with Geats therein too) but I got the 
experience for doing so. 
They didn't have Hitler Youth fades with lazy and sloppy beard fusions. Period. Full stop. Stop doing that. Looking right the fuck at you too, P R E S T I G E T V. 
Once you pay the nerd-geld you can never be rid of the nerd. But seriously, you made a pedantic nerd topic and didn't expect other pedantic nerds to show up?
It's pedantic to be annoyed by modern faddish hairstyles that are popular with chuds being plastered over ostensibly "historically accurate" shows?
Yeah, good, okay.
Lol why are you acting like people are laying into you and debate lording you when you made a historical mistake in a post about being annoyed by historical mistakes
Yes it actually is
The "lol" doesn't hide your petty rage. It kind of highlights it.
One requires digging into references to be vindictively pedantic and the other is about obvious and outwardly absurd modern haircuts, popularized by chuds, in the treat you're defending.
Are you also annoyed by the black hot topic lowkey bdsm leather clothing in medieval/medivial fantasy shows? Because I am for sure! Like it looks soo out of place and is the equivalent of portraying the modern-day American fast-food worker wearing striped suits made out of diamond plates.
I am, though primarily because it's another glaring example of how "historical accuracy" is an excuse for
with a side order of 
and as long as those elements are present, ice zombies and dragons and silly modernized costumes are all fine and "historically accurate" enough.