I know many pistols, even the venerable hi point c9 will shoot through a barrel obstruction, but that is not a 100% guarantee. Forgive me for asking, but by "just shooting through" a barrel obstruction, aren't you doing the bad guys job for him, by potentially wounding or killing yourself with an "improvised" handheld pipe bomb. Isn't primary weapons malfunction the entire reason why they developed a whole class of firearms known as backup guns, like most small .22s, .25s, .32s, or very small .380s like the keltec.
A squib requires more than a tap, rack and bang. Someone in front of you slinging lead your way, do you have time to take the barrel out and rod it and get back in the fight? That would be a no. Do what you want. I'm pretty sure most, if not all, combat fighters will take the chance of the squib clearing (or not) and get a round off compared to fumbling with something that will take minutes to clear and getting shot holding an inop paperweight.
YMMV.
Sent from somewhere in the world.