Maybe 20, 25 years ago, you could go to the nicest restaurant in town, or a great museum, etc. and, in the men's room, the stalls would be covered with the most outrageous graffiti. And you'd wonder: the customers all seem so well-heeled, so genteel! How can they do this?
Now, no graffiti. Same restaurants, museums, etc.
Why?
Because these secret nutjobs all have computers and internet access. They spew their madness all over the web.
Consider, also, the mentality of someone who spends time sniping about how someone else shaves. It could be videos of people flossing, there would be complaints (She's not getting under the gum line, the idiot!" "Look how he wrapped the floss around his fingers like a tourniquet! What a moron!").
I learned lots from Lynn Abrams's videos, Geo Fatboy's vids, and Paul H's videos. I learned the invaluable two-handed fool's pass from Charky's videos. And let's not forget Mantic, the grandaddy of the wet shaving revolution.
Of course, anyone who posts a video on a public website is vulnerable to the kind of nonsense they will likely get sometimes. One of the mixed blessings of the 'net.