Walking on the wrong side of the footpath, and when told "wrong side, keep left in Australia", they move only to return to the wrong side immediately after passing you, so you have to tell them again and again each time you approach them when doing a jog.
Driving on the wrong side of the road for a few minutes until their cognitive modality turns back on, and they do that sheepish whoopsie look back at you after you've been flashing them with your lights and honking.
Just dumping the shopping trolleys, or worse, going out of their way walking 100m to dump the shopping trolley in some imagined correct spot even if they are parked right next to the actual collection racks.
Not knowing how to open nor locate a western style fence gate to deliver a parcel.
Violating the arms distance personal space in queues, or bumping your body as they walk past you in supermarkets without even an "excuse me".
Calling me "bro" because their culture has no concept of adult nor nuclear family, they are just permanent children.
Koreans taking up the entire isle or footpath in a compact group, walking at the speed of a snail, oblivious to all the people trying to get past.
I wish such things were on an information flyer on the immigration and customs card they have to fill out when they land. Or at least on info murals at tourist spots and parks like the "don't feed the birds" and "don't take/eat the ducks" signs that they already have.
Google maps reviews where they do 5 stars with just "where contact details" or "is available?", or where all the photos are of them or of random scenery instead of the actual room or food.
Giving me the look of absolute incompetence, that deer in headlights look, when you complain about something; as they have no actual clue about what to do, as their local population just accept getting screwed over without contest. This gets infuriating when dealing with long term expat issues, like apartment complexes, cellular plans, mail deliveries, etc. Or when returning a product that arrived not working, you get a response of "you buy product, you buy its problem".
Americans and French treating everyone as servants instead of equals when they travel overseas, no one cares if you think you are the best. Americans and French driving illegally in Asia without the appropriate license and paperwork, getting fined, then attempting to protect their egos by retelling as they were hustled by corrupt cops and had to bribe them; no you ass, you got fined for being reckless.
Having to always count money before and after transactions in a verifiable way to avoid getting screwed. Getting short changed at petrol stations.
Not cleaning their misfired piss or stuck shit after a rest room visit.