OK I'm bored so I'll bite on this...
I'm not about call Jann Arden a liar in this without proof. Her version sounds reasonable to me: I have been in a position of traveling in an unfamiliar place/unfamiliar mode and just went along with the crowd/improvised as I went, which is what her account reminds me of and I have dealt with officious idiots, especially working for the federal gov't and quasi Crown corps before, all too often. I haven't seen any corroboration of outbursts/tantrums, and if sarcastic retorts fit that bill, then a lot of us are guilty a lot more often than is reported.
How this all applies to Ms Arden's body/sexuality or that of anyone else is beyond me, unless there was a lot more happening on that train then I have read.
She travels 250 days per year with her dog and always makes special travel and hotel arrangements for her dog. It seems that she was booked into a hotel that allowed pets - since we didn't hear anything about that. On VIARAIL, where animals have to travel in baggage, she and her assistant both, coincidentally, completely forgot to make travel arrangements for the dog. When she had the opportunity to make arrangements for the dog enroute, she refused and instead made a national stink about it.
Does that sound reasonable?
The first clue should be in the number of words she used to say "I Forgot" ... it's a really big, long story where she mentions even her mom. She tries to come off as a ditzy 20 year old. I don't believe a word of it.