I have to rant about #4. I hate, hate, hate the one cashier, two lanes open system at quick service locations. I understand they are necessary to keep lines compact, but they lead to confusion and no-win situations.
A couple of years ago, I went to Flame Tree in AK and walked over to the cashier at the very end. There was a large group giving their orders, and then a man and his son standing behind the group on the same side. The other lane was open, but no one was in it. Before getting into the second lane, I went to the man, told him both lanes were open and asked if he wanted to start a line in the other lane. His answer was a somewhat hostile, "There's only one line here, and you're behind me in it." Okay, so I now had two choices: (1) go into the open second lane and risk some unpleasant words, or (2) get in line behind him and hope no one notices the other lane. I chose the latter (yes, I know I'm a wimp) because I didn't want any kind of unpleasant confrontation. Almost immediately, two parties got into the open second lane. I politely asked the man, "Aren't you going to tell them there is only one line?" (passive aggressive, yes, but I couldn't resist saying something) and was rewarded with a lovely obscenity, right in front of his son. I also ended up waiting longer than I should have.
Even when the people all lined up on one side aren't jerks, they often seem confused and unwilling to move when you tell them there are two open lanes. I love, love, love mobile ordering!