Actually, I had a similar(ish) experience to the first comic back when my friends and I got together to put on shows for local metal bands.
One of our scheduled bands (a crappy mallcore band by the name of Esoteric) got all rockstar on us, demanding we let their manager in free. It was made clear long before that, that there was no guest list as the expected turnout was already so low. No exceptions.
The fact is, if the bitch really cared about the band she was managing, she would have paid the fucking $5 charge without complaint. A member of the band became hostile and the manager decided to start raising hell right in the middle of a band's set. Needless to say, we decided we didn't really need that band to play, and gave the extra 40 minutes to the headliner.
Some bands can be complete fucking pricks.
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Do you want ants? Because that's how you get ants.