Young adults often believe that their parents (and most other adults) are stupid and boring. Probably since the beginning of the stage of life known as adolescence, this has been a common sentiment of the young. It may also very well be true in many instances as older adults can often be dumb and/or boring. It is perfectly okay for a teenager to feel this way.
What is not okay, however, is for the young to voice this opinion to their elders, to address them sarcastically, and to treat their elders with contempt. Good manners, consideration for others, and just plain self-interest dictate that the young person keep his/her opinion to himself/herself. No adult likes to be challenged in this regard by a "young smartypants." Showing contempt for another does not win one accolades from that person or other adults observing the inter-action. Furthermore it is just mean behavior on the part of the young person.
So, the savvy teen feels what they feel, but keeps it to his or herself. He/she is regarded as thoughtful, nice, polite and compassionate. That is a far better reputation to have than one as a surly, know-it all, kid. Enough said.
