These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Fridge Brilliance: Killing your alternate self takes the life force they could have potentially spent during their lifetime and divides it among the survivors. However this life force fades with age. This would explain all those stories about 75 year olds who climb Mount Everest and such. They've gotten the life force of all their copies that they outlived, but they're so old and the amount of remaining life force so little, that it only makes them a bit more active instead of a super-powered being. Yulaw on the other hand is deliberately killing alternate versions of himself when they're decades from expiring naturally, giving him massive amounts of power whilst still young.
The whole "alternate universes with a different version of you in every one" aspect of the movie naturally brings up a major Fridge Horror consequence that's present in every take on the idea: Everyone's lives are predetermined. After all, how else will you get together with the same guy/girl to have the exact same kid in every universe?
Granted, this ignores the possibility that it is simply most probable that one would make such and such decision at a time. The fact that there are finite versions of Law doesn't necessarily mean there are only 125 universes, but simply that there are 125 iterations of Law that are similar enough to be connected.
Yulaw is last seen defeating scores of inmates in a prison dimension. However he's actually still under the effects of being teleported. In a few minutes or less he'll be back to full strength.
Fridge Logic: How can the MVA not know the effects of someone outliving all their alternate universe selves? Surely out of all the billions upon billions of people who've ever lived, at least one of them had to have done it without having to go on a multiversal killing spree. And for that matter, if a person's remaining life force is redistributed among the survivors, why don't we have a lot more super-powered geriatrics?
What an Idiot: So Yulaw is finally captured, and the MVA are about to send him to prison. Do they lock him up in solitary so that he doesn't run the risk of getting shanked from behind? Nope. They just dump him in the yard, where he proceeds to immediately get into a fight with everyone in the general vicinity, who could end up wearing him down and finishing him off. Good job, guys.
As well as checking only one of the Laws at the end to verify identity before sending him to the prison dimension just because they only had a couple minutes before the next window.
Actually not as stupid as you might think. Even if they guess wrong - ONE of them is still marooned in a prison universe, where it was heavily implied that it was impossible to travel directly to and from. If Yulaw wanted to get to him, he'd become the one... but be stuck there forever.