, but if they don’t self-deport and are later caught and deported, they will be blacklisted and never allowed back.
oh sure...
they will by that point have developed as sufficiently functional moral compass to give a rats rear end to follow RULES??
ooookay
Yes, because you gave them the incentive to self deport.
The way you get people to comply with the law is to reward compliance and penalize non-compliance, up to this point people are actually rewarded for non-compliance, which is why they ignore the law.