Why should they hate FT?
In general, FTers are courteous, easy to deal with, and certainly knowledeable. I think if anything, airline employees APPRECIATE travellers that are savvy and know "the drill" as it were.
Its the ignorant, nervous, once-a-year types that irritate the airline employees. If everyone was an FTer, flying would be much easier all around.
Just my two cents
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"I just wanna wish you good luck, we're all counting on you"
-Dr. Rumack