There’s no copyright involved in taking a picture of someone, or having a picture of someone… Your tourist pictures are fine. If you publicize then or try selling them, that might be an issue, but making it inconvenient for people to make money off of non-permission photos isn’t really concerning to most people.

Well ‘no benefits’ is a bit of a stretch.

You’re probably getting suggestions for what she should do different because, at least at a starting point, it could just as easily be something her phone is doing before sending as it is something your phone is doing on the receiving end.

I’ve had a phone say ‘video to big, do you want to crop or share through abc app’ before. Don’t recall the exact message, but seems more likely than you phone downgrading something it’s receiving.

This is a really old message, but if you’re still having the same question i could try to answer, but that kind of message is pretty context dependant. For that specific one, it sounds like your program is trying to access something outside your network, like they have a website they need to access to check for updates or something.

Maybe think of it like one of those big walls of post office mailboxes…behind the wall is your computer and an app might be waiting for a message at box 22 or box 45678. You could close all the boxes and nothing could get in, or you could open one or all of them and allow people to deliver messages to them.

If you connect your computer directly to the internet, anyone who knows your IP address could say 'deliver message X to port 22 at ip address <your ip address> and the program watching that box would get the message.

If you put a router in the mix, and multiple computers, the router has the same block of boxes, but if someone sends a message to one of the boxes it just sets there. If you set up ‘forwarding’, sending a message to your ip address gets the message to the router, but if you forward box 22 from your router to a specific computer on your network, then the router takes a message at box 22 on itself and ‘forwards’ it to box 22 on whatever computer you specific (using internal ip addresses).

You could map box 22 on your router to any other box on your computer…like port 22 coming into your router might get sent to port 155 on your computer…this is useful if you don’t want external people just exploring and lazily breaking into your computer using known vulnerabilities. Lots of ports are ‘common’, so an ftp hack on port 22 is easy, and might be ‘slightly’ harder if you tell your computer to actually look for ftp traffic on port 3333 or something.

I think this is a little over-simplified. If there are only a few tables it likely happens, but with current staffing, even before covid, if a servers section is full there’s no way they can watch for tiny signals from every table. Heck it’s hard to even catch your servers attention in most restaurants during busy times between when they are taking orders and actually serving other tables.

Sub-protocol here…you can walk on the right but don’t stand on the left. Kind of like the fast and slow lanes on the road.