9. People seem to be fairly incapable of living between both worlds so you’re forced to abandon muggle friends and family or reject the wizarding world.
Except Hermione.

Harry Potter And The Sorcerer’s Stone
10. The danger that a wizard might go rogue and reveal magic to the Muggle’s military forces.
11. Slavery, forced segregation, and the subjugation and racism (specisim?) against sentient species is all taken as a matter of course.
Not the work of Dark Wizards: not the work of angry Muggles: but the work of normal, more-or-less good people.
It takes a Muggle born to even broach the fact that magically enslaving an entire species is kinda wrong.
12. Hagrid’s dad managing to impregnate Hagrid’s mom is a pretty horrible situation to think on.
It’s also apparently pretty easy to manipulate flying balls into chasing after a specific individual with the goal of shattering the bones in their body, so you could be minding your own business one day when BAM, giant ball to the spine.
– Solias