Have you ever temporarily thought something bad happened to someone you know? When you realize nothing happened you just move on.

We'll have to agree to disagree then

It's temporary fear followed by a joyful realization that you haven't lost your cat. It isn't harmful unless the target is mentally weak, and neither of them is mentally weak.

They aren't mean, because they put each other in fearful situations for moments and then reveal that it was just an illusion. It's also agreed upon. The hypothetical prank you describe is clearly not like this prank in nature. This one involves a short temporary scare, and then a happy ending when she is reunited…

Jezebel is a place where the most petty and loathsome women try to convince each other that their sadistic aggression is justified somehow

If you are so fragile that pranks will put you in therapy, then don't get into a relationship with a prankster. The fact that these two are not so mentally weak is not a reason to disrespect them.

Playing harmless pranks on your loved one, which you both have agreed is okay, and using them to make a living to support their lifestyle = bad.

It's a channel called prank vs prank, which they both have agreed to participate in, and which they both make a good living off of. They obviously both benefit enough for this to be reasonable behaviour out of them.

Jezebel takes everything so damn seriously. They both make a good living doing this stuff to each other. Stop trying to find villains everywhere