Is that really aggressive behaviour? Or just annoying? My poor DH is often left waiting in the car whilst I chat "rubbish" with friends... (me longing for adult company I think!) and he gets a bit narky with me sometimes.. but it's certainly not done to annoy him deliberately.. so I wouldn't call it PA behaviour... in fact I could put it another way and say he's being PA by going and sitting in the car getting narky when I want to stay and chat! LOL I just feel some of the examples are just something someone doesn't like or isn't agreeing with and it's being plastered with the label Passive Aggressive.
It depends if they are doing it to control you or exert some kind of power over you. They are indirectly doing that, hence the phrase passive aggression. There is someone in my family who will ALWAYS keep people waiting, regardless of the severity of the situation. (I'm talking about someone dying in hospital and he *had* to have a shower - that kind of thing.) It isn't just a thing about being disorganised or whatever - it's purely a power play. "you can't go anywhere without me, you are depending on me, and I'm going to make you wait". Drives me nuts.

My dh will also do some minor things in that train, like not tell the kids where we are going when we head off somewhere, or tell them what's for dinner. It's not just annoying - at heart it's about saying, "I have the power. You don't. And I'll decide what information to share with you." Also drives me nuts.