Meh, that's just about whether people have manners/basic awareness or not. Nothing to do with laptops.
If someone is rude and not aware of others then they will be that person regardless of whether they have a laptop with them or not.
Someone nursing one lemonade for two hours while they read a book (waiting for a train, for example) when there's a queue of people aren't magically un-rude just because they don't have a hated laptop.
People who take up a table for hours chatting without buying anything are much ruder than someone who uses a laptop but buys lunch.
Where I live, I regularly see groups of mums take their toddlers into cafes, bring in outside food, let their kids run riot and smear food everywhere. That's clearly taking the piss a million times more than any laptop worker yet no one would dream of saying people shouldn't bring toddlers to cafes.
There's one place that I had to stop using because they decided to ban laptops after 5pm (I mainly work in the evenings) but there's a local art class that uses the space for free. So once a week about 20 people pile in, take up a lot of space, take up chairs, and I've never seen a single one of them purchase so much as a coffee. Just use the space for free without giving the venue a penny. I've also seen language groups using the space for free, not buying anything. It's a bit shit that they're all welcome when they don't spend any money and are a distraction and take up a huge amount of space, but I'm not allowed to buy dinner and a glass of wine, do a bit of work on my tablet, or even just read on a tablet, then leave after less than an hour. Their choice of course just a bit shit.
Some people are just rude. A percentage of rude people sometimes use laptops. Many rude people don't use laptops. The common denominator here is not laptop use, it's people.