The main point is some youngster saying "get used to us". The feeling a superiority normally found in teenagers just beginning to enter the real world, here expressed in full print. It is a very nice example.
Obviously, a generation ago, the people she is saying it to, said it to their elders, and so on and so forth. King Solomon said it best (Ecc 1:10):
Is there [any] thing whereof it may be said, See, this [is] new? it hath been already of old time, which was before us.
The comments there are mildly amusing.