Inspite of the best efforts of the lenders and trusted members, there has been a spate of scams. To prevent that use the trust rating wisely.

[1] When giving out a collateral free loan, give a neutral feedback mentioning the loan.
[2] When you receive a loan request, check the trust rating, click on untrusted feedback, and see if there are any ratings which may be of concern.

It should help to detect loanees who take out multiple loans. This seems to be the recent trend these days.
Warnings may not be given as negative feedback but as neutral, so it will not show up unless you go into their trust rating.