Say a person likes to take pictures and they live in Seattle, but these pictures are of people in public, is doing so legal? These people are on public property such as playgrounds soo this guy isn't really doing anything illegal correct? Keep in mind doing this makes him feel happy when he's having a shitty day.
If you're a guy, taking pictures in playgrounds will get the police called on you. You can take pictures in more neutral places, but stay away from places where children gather. Actually, just dont take pictures of children at all.
If the police do come you can't get in trouble you're not doing anything wrong ....like I said it makes this person feel happy if they've had a shitty day a university. He can't tell his friends or GF cause he knows they wouldn't understand.
You don't have to pretend it isn't about you. It's not illegal but it will get you hassled, and if you cause trouble for the police they will get a warrant to search your devices for child pornography, particularly if you do this a lot.
You should consider taking pictures of something else, why kids in particular, man?
I believe the deciding factor will be what kind of photos you take and what you do with them.
Taking photos of people in public CAN be illegal in certain situations. eg Upskirt photos or anything that might publicly defame the character of the person in the shot.