Sometimes it's a fine line between comedy and cruelty. This time it's not.

As the "Inside Edition" video above shows, even the parents who run the DaddyOFive YouTube channel admit that ... now.

But they didn't until their videos -- in which they play elaborate pranks on their own children, sometimes reducing the kids to tears -- came under fire from numerous groups that accuse them of behavior bordering on outright abuse.

My family played jokes and had lots of laughs when I was a kid, but never anything that would've caused meltdowns like this. Plus, my brother and I never questioned whether our parents loved us.

These kids, however, might have some uncertainty there.

Take a look at some of their stunts and tell us what you think. Have they been going too far?