It depends. If their kid is well behaved and their parents are close by (within a ~10 feet/~3m of the child), I don’t mind much. I only get annoyed when kids’ parents just straight up leave the immediate area without asking me first if I can keep an eye on them for a few minutes. Though, in the library, it isn’t that big of a deal, since the kids areas tend to be well monitored by staff and open enough for parents to have clear line of sight. And I am 100% not afraid of telling a stranger’s kid to clean their shit up afterwards in the library. If they get mad at me I’ll just point up at the big board with the rules in our library that says to clean up after yourself.
It depends. If their kid is well behaved and their parents are close by (within a ~10 feet/~3m of the child), I don’t mind much. I only get annoyed when kids’ parents just straight up leave the immediate area without asking me first if I can keep an eye on them for a few minutes. Though, in the library, it isn’t that big of a deal, since the kids areas tend to be well monitored by staff and open enough for parents to have clear line of sight. And I am 100% not afraid of telling a stranger’s kid to clean their shit up afterwards in the library. If they get mad at me I’ll just point up at the big board with the rules in our library that says to clean up after yourself.