On a somewhat related point, I'll just note that I've gotten a bit tired of the situation where I get into a rules dispute with someone from the desk, and then eventually prevail, and then there's little acknowledgment that moments before the agent was telling me I couldn't do what I was eventually told was permissible (this came up quite a bit in terms of getting the Canadian discount, whether I needed a Canadian credit card if I was actually in Canada when I made the purchase, whether I had to live in Canada, etc.). There were also a couple of times where I believe my PNR was noted to indicate that I couldn't do something, apparently to avoid my trying to convince a different AA agent that my interpretation was correct.

Going back to Gardyloo's original posting, during my brief experience with booking a RTW ticket, it seemed that whenever I was told I COULDN'T do something, some remark would immediately be added to my PNR to that effect. Not sure if I was just being paranoid though...