Asshats, the concerned, and those required by law to report anything that might be a death threat to the President can and will report even a facetious post that could be interpreted as a threat. It's a fact of life.
I'm not saying to not post fervent prayers to the powers that be to, if it is within their Divine will, have someone important and dangerous to the very fabric of the Constitution choke on a pretzel, say. I'm just saying, if you post something like that or grouchier, that someone who may or may not be doing so out of a sense of justice and right (or malice and obnoxiousness) could report it, and you, too, could have someone unamused on your doorstep at odd times of night.