being as its micro loans theres not much colaterral to ask for though correct?
You will still get ripped off for micro loans if you are not careful. Asking for collaterals is your decision.
If you are offering collateral free loans, you are taking the risk so there is no reason for anybody to not seek the loan from you.
OP needs to keep in mind that accounts with green trust are also for sale and could be used in here without anyone really knowing that.
I would only do collateral and escrow at this point