bitching and exercising constructive criticism are two different pairs of shoes. That's what makes the big difference between a pro and a amateur. The same principle applies to flying job. I'm sure everybody had that experience where it's much more pleasant to have a constructive pro conducting your check ride rather than a nagging wannabe tapping in the dark and sliding onto a level of personal abuse. Conclusion: stay focused on the issue don't get personal. One thing is for sure truth must be revealed without offensive attacks. I agree with 515 be reasonably nice to everybody or just comply with elementary behavior rules as human being and many doors will open.
Don't take it personally take it on the rocks!!!