Would you reply to those italki's user without any information?

Hi, everybody. As my Title, would you reply to those users without photo or any information? 

We don't know each other,  photo is the first step let me know who you are. And then read the information,i can guess how you are.

When those who without any information say only "hi" ,be honest , I am put off .I'm very confussed what they want to do.