Self-Importance
The only thing I can think of that might motivate this behavior is an attitude of self-importance. The instance you mentioned above with the comment attached to the resume is certainly becoming more common in my experience. For instance today one of my coworkers was haranguing our main software developer about a small change that occurred in the latest release of a particular software. It was change that was mildly annoying yes but could have been dealt with easily enough with our resources here. Instead he decided to tell them how much their software sucked. While I wouldn't disagree it seems to be another example of the "read my mind behavior"; programmers are only human and cannot please everyone.
