as I see your point, you're a bit off. Really far off, actually. Photography is sure as hell a real fucking talent. The vast majority of kids "filling up our instagram feed with shitty pictures with stupid filters and 450 hashtags" don't consider it a hobby and by no means claim to be photographers. They see the sunset or whatnot, think that it looks cool, take a picture, and upload said picture to the internet. I see no harm in that, and nor should you. If it bothers you that much just don't friggin follow them. That's the best part about social media - you can chose to follow who you wish.
Back to my point about it being a real talent. 9 times out of 10 when you see a photo that stands out and makes you really look at it and enjoy it, it wasn't just taken with no thought. The photographer probably made a decent effort to make it the best photo possible, especially if it's professional.
Did you look at this kid's gallery? Most of the pictures aren't half bad! They sure aren't all of shitty sunsets and cappuccinos. The kid's got potential for sure. Do you really expect a 14 year old to be a professional photographer?  I sure as fuck don't. So if the kid loves taking photos, let him take as many photos as his heart desires, because that is how one becomes a good photographer.
tl;dr: shut the fuck up and let people enjoy expressing themselves through the beautiful art form that is photography.