This is interesting. I find the idea that people want a grade or rating on their skills intensely fascinating. Actually I find people and data science intensely

This is interesting. I find the idea that people want a grade or rating on their skills intensely fascinating. Actually I find people and data science intensely fascinating, so that probably contributed as well. However my knee-jerk reaction was more of revulsion. "Who are you to apply any sort of label to my abilities based on a presence!" is probably close to my first thought. That and I totally don't contribute to any of the listed hangouts so I knew I'd "suck" immediately. Perhaps include more "hangouts"? Project Euler for example.