I, too, have a .25 auto story.
And it's second-hand, too!
A "friend of a neighbor" once told me that he'd been shot by one of those. IIRC, he told me that he was out drinking one night, and felt something funny in his forearm the next morning. On looking, he saw a hole there, like a LARGE pimple, squeezed it, and out popped a .25acp bullet.
I have also heard of people being instantaneously shot dead on the spot by those things.
No rational person wants to get shot, as Mr. Barnes (of "Cartridges of the World") said. A .25 would certainly deter me, if you think I should back off.
However, there exist, from time to time, people who are brave and/or crazy. That's why we have bigger guns.
I think I remember reading that the reason police departments went from .32 S&W to .38 Colt Special was the racist cocaine scare of 100 yrs ago; you know, "Negroes with their heads full of cocaine cannot be stopped by ordinary pistols in their insane jungle lust to rape the white women!"
And then, shortly afterwards, we had to buy even bigger pistols to shoot those pesky Filipinos!
I guess what I'm trying to say here, is that if an otherwise prudent decent rational person gets temporarily out of line, you might be able to dissuade and chill him by displaying even a just-barely-deadly weapon, but if ya gotcha a Juramentado, well, crew-served artillery is cool.
P.S.
Don't we have at least one Filipino member who has bragged here about his countrymen being so hard to kill, that we had to invent a whole new cartridge, just for them?
Edited for spelling.