Several times on HN I have posed replies that consist of the snappy comment: "your logical fallacy is: " followed by a link. It doesn't usually go over well.
Yes, it would be wise to do those things. I mean, to do them as well: It's not one of the other. The "don't go to Mars, fix poverty" argument is something like Whataboutery or "Fallacy of relative privation"
https://en.wikipedia.org/wiki/Whataboutism
http://www.logicallyfallacious.com/index.php/logical-fallaci...