OK, that's interesting, and I agree that for the use case you specify you're essentially fixing a hole in the ethereum specification / building out the 'standard library' in a useful way.

If I were running it, I would still make strong recommendations that recipients of the alarm 'ping' only execute idempotent functions which do not rely on any data from the ping itself, or on the ping being executed implying any state anywhere in the world, whether on blockchain or not.