Dating should not be so serious. I think some of us have forgotten how to say hello in the real world and have an actual conversation with someone. Who knows what kind of friendship you will find along the way. People are worried that if they take the first step, they may get rejected. I am going to make an effort each week to meet someone new and start a conversation to find out enough information to start a friendship.
If I have added you to my favorites and you are not interested, you can remove yourself from the list.
And.....it is ok to tell someone that you are just not interested instead of not responding to an email.