Oh absolutely!
My son wet his pants 2 years in a row @ MK (he was 5 & 6 and didn't want to take time out to go to the bathroom, and din't tell anyone until it was too late) The ride back on the bus was unpleasant and accompanied by a lot of "I'm not sitting with him....ewwww! He has pee-pants!"
......and the constant "sister hitting."
......and last year the daily argument over the top bunk (no bunks this year

)
...and as we were getting ready to go to
MNSSHP when a cast member called my daughter a beautiful princess (she was soooo proud of her dress) and my son corrected him saying, "No, she is a FAT princess!"
...and the knock-down, drag-out over a bag of doritos...
...and another no-holds barred death match over which color power ranger we were going to see!
...and the time my son left his fanny pack that held about 10 lbs of candy from MNSSHP and his lanyard with about a zillion traded pins in the bathroom (we told him not to take it off 84,000 times!) it was never returned....and the 1/2 hour sob fest that followed

He then got the brilliant idea that his sister should share hers (pins and all) because he didn't have any...the argument went something like this...."I'm not giving you mine, it's not my fault you are a stupid baby and lost yours!" "Mommy told you not to take it off, dummy!" ...and the well thought out reply...."You're fat! and you stink!"