The modern fiat and fractional reserve banking system is literally an enslavement system and interest is one of the main causes of the enslavement. There is not enough money in existence to pay back the interest allegedly owed - which therefore guarantees that statistically, many will 'go broke' almost regardless of what they do.

This is not a 'mistake', this is entirely by design!

How do you 'ban' interest in an anarchy though? If some people voluntarily choose to pay interest then that is for them to deal with. In my view, the problem is that they are in the position of thinking they need to borrow money in the first place.