Having seen School Raze, I've noticed something horrible about Pinkie: She knows full well how annoying she can be... But she does nothing about it. Well, that or the writers got her character wrong.

6623068
Haven't yet seen School Raze but can confirm that as an older brother, there are times when I know full well I'm being a pain in the patookie to my younger siblings, and I'll still keep going. If anything, that makes me want to keep going

6623068 I think she was specifically trying to be annoying. The whole point was to irritate Tirek enough so that he'd want the mane six to leave, and irritating him was the fastest way to do it.

6623068 And imagine the creepy story that could emerge if years later, somepony opened the door to reveal inside six skeletons and a crazed Tirek. The potential is astonishing.

6623068
I think that was her plan all along, to annoy Tirek to the point of breaking down.