Exactly how was he abused? He lists a few reasons:
1) He was criticized as being wrong for not following very dogmatic principles to the letter of the law.
2) He was also concerned that nobody really seemed to care much about his relevant business experience and really only judged him intensely on his programming skills, which he felt was only one aspect of his software development experience.
3) It was an open floor plan where everybody wore jeans, t-shirts and sandals.
4) The vast majority were in their early 20's with the oldest person and lead developer being 30.
5) They expected him to be involved in side projects and code for fun when he wasn't in the office.
Which of these are really abuse? Only #1 seems in any way negative, and that sounds more like a slightly bad interviewer than any sort of abuse. Honestly it seems like the OP felt that he was interviewing poorly and decided to walk out instead of being rejected. Now that's a perfectly natural human response; everyone wants to be in control of their own destiny.
But is it a professional response to some sort of abuse? No, it doesn't really seem like it.
Personally I wouldn't consider that abuse either. IMHO a good interview is supposed to be hard. How else can you differentiate good candidates from bad? Perhaps others disagree.
A good interview doesn't just filter out bad candidates - it also persuades good candidates, who will undoubtedly get other job offers, that they want to work for you. It shouldn't be a courtroom-style grilling - it should be difficult but fun. Honey to catch your flies instead of vinegar.
I'm not saying this was a problem with the interview described as there isn't enough detail in the original post to say what happened really.
1) He was criticized as being wrong for not following very dogmatic principles to the letter of the law.
2) He was also concerned that nobody really seemed to care much about his relevant business experience and really only judged him intensely on his programming skills, which he felt was only one aspect of his software development experience.
3) It was an open floor plan where everybody wore jeans, t-shirts and sandals.
4) The vast majority were in their early 20's with the oldest person and lead developer being 30.
5) They expected him to be involved in side projects and code for fun when he wasn't in the office.
Which of these are really abuse? Only #1 seems in any way negative, and that sounds more like a slightly bad interviewer than any sort of abuse. Honestly it seems like the OP felt that he was interviewing poorly and decided to walk out instead of being rejected. Now that's a perfectly natural human response; everyone wants to be in control of their own destiny.
But is it a professional response to some sort of abuse? No, it doesn't really seem like it.