I do not think this is funny, I think it's rather immature.

But if things like this _actually_ trigger any sort of response, then the effed up thing isn't the (childish) prank, it's the system actually acting on nonsense.

If I call the police and claim that you're armed and hold hostages, then that's irresponsible. If I shout bullshit instead and these novelty devices turn that into a web search, there's no way in hell that should have any consequences whatsoever.

Why is it irresponsible?

If that person does make it on to a watchlist it's wasting resources and causing them 'harm' (eg always stopped at border checks).

We always get stopped at borders anyway, what do you mean?