Why would it be dangerous to meet an “internet friend”alone？

The words said by the “internet friend”may not be true.And the “internet friend” is defective in moral sense.

Because you don't know who he is,if he is a bad actor and you go to meet him alone,you will in danger.
翻译:因为你不知道他是谁，如果他是一个坏蛋而且是你单独去见他，你会陷入危险之中。

becasuse you do not know the turth of an "internet friend".And you have no idea about what do them want to do.