Oh yeah, this is something I can not STAND. When dck's suddenly act up, or act like helpless babies when their parents arrive. I have had one boy who always tried to run into the house, but I'm always right there and stop them. I don't care what the parents think, it's not cute or funny to encourage your child that not listening is ok. The one who I am referring to also becomes helpless baby who can't do anything for himself (3 1/2).
Another boy, gets hyper and fights his parents at the door. Dad gets super frustrated and I can tell he's afraid to be stern in front of me for what I might think, Mom ignores the bad behaviours so I always get him ready before she arrives. And even then it can be a gong show, lol.

Oh, I have another story...sometimes dcb's grandma comes to pick him up. To help her out, I get him ready for the time she is going to arrive. Last week when she came I was busy with other daycare children so I couldn't get him ready to go and she came in and looked all shocked and practically yelled (she's loud in general) "I'm here and you're not ready?!?!? Let's go, we have to go!" Guess whose snarky remark won't get her help in the future?? lol.