How cruel/mean is doing an ''I want a divorce'' prank?

Someone did this once long ago, scared the hell out of the husband. They're still married. It's been 12 years since that prank. It was never done ever again.

If you had to grade it from a 1-10 scale, how cruel/mean is doing a divorce prank?

How cruel/mean is doing an ''I want a divorce'' prank?
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