Debt simplification is awesome, but can get out of hand when people don't pay back their debts as the money can end up getting funneled to one person.

For example:
In our situation we have a group for our apartment. We take advantage of splitwise so that people can easily buy things for other people and know its covered. We also have a recurring payment for rent which is paid by to one person (A) who then pays the bill itself. At the end of each month if everyone zeros out it's perfect. However if someone (B) comes up short all of the debt falls on (A).

This can be solved by having other members of the group pay in to balance the debt. However it would be cool if there were ways to constrain how much debt can be funneled to one person.