使不法之徒有可乘之机 用英语怎么说?

为你翻译,请阅：（以小明为例）
【Xiaoming plays right into lawbreakers‘ hands.】
【lawbreaker】不法之徒
【play into one's hands】给某人可乘之机
看你在线,

最浅显的说法就是：

It opens the door for the criminals (to do sth)

Give a target to the outlaw.
The outlaw will take advantage of it.
祝你进步！