haha, i couldn't stop laughing for a solid hour the first time i saw one of those.
i guess the only thing that annoys/bugs me the way truck-nuts annoy/bug you would be.... when people are talking to me and while they're saying something they walk into another room and not only expect me to be able to hear them no problem, but also reply to what they said. and then they go the extra mile in annoyance when i'm trying to answer them and i have to yell so they can hear me, and guess what, the person usually gets upset that i was yelling at them! they think that i'm yelling because i'm mad (well i am), but it's just cause you decided to take the conversation into another room without notifying me..... oh well, i guess the world has forgotten about common sense.