It's sad that these scammers are victims themselves, but measures that reduce the extent to which these victims can victimize other people are a clear net good for society. You won't save a trafficked scammer by hanging up early so he can move on to easier marks, but you can prevent him from using the next hour to make a new victim out of somebody else.
Or to put this in other terms; you're a Ukrainian machine gunner. In the distance you see Russian soldiers. You know that many of them are from the Russian gulags, unjustly imprisoned in an oppressive autocracy, quite likely for a crime they didn't commit, and now forced to invade a foreign country. You pull the trigger and mow those victims down, because if you don't those victims will make victims out of your friends, family, and fellow countrymen.
> You’re not saving someone else from getting scammed, you’re messing up a quota for someone who might be physically punished for missing it.
At some level, starving the beast is the only way to stop it. The more crimes they commit, the more likely it is they get caught. You can't account for the disposition of victims in the hands of thugs, and there's no guarantee victims won't get fed to pigs even if they were consistently Employee of the Month. If you already have a viable way to dispose of bodies, why let anybody leave?
The better reason not to play games with scammers is that you're antagonizing someone who does not respect rule of law. Consider what someone overconfident in their ability to commit crimes unchecked might do to you in retribution.
I always assumed that they were not really doing this job by choice, whether it’s modern slavery or not.
You’re not saving someone else from getting scammed, you’re messing up a quota for someone who might be physically punished for missing it.