Do you think it's right to make a 16 year old always use her laptop in family areas?

Just work on it upstairs, tell her if she wants to see what you're doing tell her she can get a chair & sit right down next to you because you're not moving. Just don't bend, she's the one being ridiculous & she should eventually cave. Don't take people's crap, if you want to go to a good college & the only way you can do that is by working hard & to work hard you need quiet then go upstairs, it's not illegal & tbh she can't exactly stop you.