Iām gonna guess in a world of magic that the ādo not attempt what you see at homeā warning in a lot of media is taken a lot more seriously? With the existance of magic making a lot of the superpowers & cartoonish phenomenon in comic books and movies becoming actually feasible!
How often is it that some young and dumb people get injured trying to use magic to imitate what they see in media? Like some teenage fae trying some half baked spells to fly and shoot laser beams of their eyes or something along those lines?
I hate to make this comparison, but it's the best one I can think of: this phenomenon is similar to young/dumb/drunk people playing around with guns or fireworks IRL. It does happen from time to time, people lose body parts and even their lives by throwing spells around irresponsibly. Lobbing a hazard spell is treated like firing a gun.
Children can certainly cast spells irresponsibly, but magical tragedies among children don't happen as often as you'd think. Toddlers and young kids can't usually cast spells strong enough to hurt people, and by the time they're old enough to grasp such spells, they are usually old enough to understand how to use them responsibly. Magic mentors teach about this responsibility long before they start teaching the actual spells. Of course, some kids are just destined for trouble no matter what...
(For example: When Tep was a child, he nearly burned down Yerim-Mor palace numerous times by playing with pyromancy spells. He knew better, but he just couldn't resist the allure of the flames...)
As for drunk people...Casting spells takes intense concentration, so novice mages can't cast them at all while they're drunk/high. Experienced sorcerers can, but these spells will be weakened or sloppy. Once in a blue moon there may be an incident where a sorcerer slams some bad drugs and starts throwing lightning bolts around in public, but it's pretty rare.
Safety is the highest priority when it comes to spellcasting. As I said, it's treated a lot like gun safety, and there are just as many regulations around who can cast spells, and when and where they can cast them. Accidents do happen, but they're not common enough to tear society apart. Magical misfires are like car crashes; they're rarely intentional.