Comparison of images from three IAMA threads

I am a police officer:

I am a valedictorian and a heroin user:

I hear voices and am doing alright:

Nodes represent authors, edges are reply relationships in the first 100 shown messages in the threads (omitting suppressed low scoring messages).  Dotted line indicates question, solid is non-question;  gray is on topic, red is off.  Size is proportional to the natural log of message karma, and color represents commitment, operationalized as # of trophies (light green low (0-1)), blue is high (about 4or 5).    Nodes are grouped by local network structure and in the case of local isolates, by color also.