Is it me or does this site use stackexchange style profile pictures?

Does anyone know the answer to this question? Why does Dart use stackExchange style pfp?

Were you perhaps  bored or tired when you came up with this?

I'm pretty sure it's just you.

You’re absolutely correct, sir.

Well it is at least better than pure circles in DDO. 

These are common default profile pictures I think. They are seen on sites like wordpress.com.

I remember back then when you are advertising DArt on DDO and your picture is just a bare purple circle under a mono back tone. 

This design is genius. Everyone's colors are different, and the patterns are easy-to-render. So even if you are completely uninterested in uploading a pfp you'd still be identified. I could simply tell the difference between PinkFreud08 and DynamicSquid despite none of those had unique uploaded pfps.