What is the joke of "Evil Grinning Face?"

Hate to burst your bubble, but that avatar was used by Opeth, and Pomegranate. Only this avatar I'm using appears to be larger.

And that's the face of Mega Milk or whatever.

You're not cool enough to use that face. Mark was the original Mega Milk face.

Mega Milk, okay. so thats where its from, but whats mega milk?

Telling you will get the poster banned.

Mark used that face as his avatar, at his prime, when he was on SP. Now he's pretty boring. Then everybody copied him, which was pretty funny.

Because one can only be a snarky wiseass for so long before risking getting banned, or permabanned. By the same technicality I can declare you boring in comparison with your "previous self" but that's somewhat stretching it.