This is my cat, Max. His dad was a feral maine coon and his mum was a lazy barn cat. He is simultaneously weirdly crafty and the most head-empty animal you could meet.
He yaps a lot which is normal, he likes annoying the birds at our window. But also he will not stop eating hair? I don't exactly leave random strands of hair everywhere; my wife and I have shoulder length & extremely long hair respectively, but we always put stray strands in the bin.
Idk where he even finds it, but he eats hair. He loves to eat hair. He sits by the couch or our carpeted stairs and he chomps at the air, trying to grab a spare strand and eat it. He chomps like mad all day at random places. Occasionally I catch him dragging his ass, because he has a turd hanging from his butthole by a long strand of hair 
Why on earth does he do this? How do I stop him? Why is my dog so dumb??
Reminder to anyone dealing with hair-attached turds dangling from more turd that's still inside your cats butthole: DO NOT pull on the dangler, you could give your cat anal prolapse or mess up their insides
If you must, use scissors to remove danglers by carefully cutting through poop/hair, then just encourage your cat to finish their poopin business. Sometimes we just put ours in the bathroom with her litter box and close the door. Another thing you can do is dab some warm water around their butthole, to emulate the way momma cats apparently lick their little kittens buttholes to encourage them to go
See this is what I was looking for, ty. I have always wondered about the health concerns, my hairs are like three feet long. Might try the warm water thing tbh.