Their door only gets kicked in if the intelligence analyst or counterterrorism agent reviewing the material isn't able to tell it's an obvious joke, which I find unlikely.

Here's an old Soviet joke for you:

"Comrade Stalin, I heard you collect political jokes."

"Yes, I do, comrade."

"How many have you collected?"

"Three and a half labour camps' worth."

If you want an uninteresting life, expect that the police have no sense of humour.

They might have a quota to fill.