I have more a bone to pick with buyers who take advantage on purpose, while knowing exactly what they’re doing. I don’t mind helping out as long as that person isn’t trying to pull the wool over my eyes.
Buyers who are lost, navigation wise - help them! A little friendliness goes a long way. It might influence them to become your repeat customer. Buyers who ask for a little extra - why not give them the extra if it’s not a huge deal? Then there’s always additional orders for larger revisions. If a buyer doesn’t pay attention, do your best to deal with what they will pay attention to, and let the details play themselves out. If they provide nothing - cancel the order, don’t stress out about it!
As a seller, you have to be malleable. Most buyers are not so bright, unfortunately.