An enlightening post indeed, but the title reads oddly - "Who is Demoscener?" suggests that there is a single person called "Demoscener" that your article is about, whereas as it's actually about multiple people in the demoscene I suggest you should rename it to "Who are demosceners?"

Grammatically speaking, you're absolutely right! But I had some personal reasons to name it that way :) Thanks for pointing it out! And thanks for reading!