Grindr should have a meeting tool. You arrange a meeting with someone and post a time and date. Once you meet the person, you tap the phone onto each other or scan the code to confirm the appointment. If the person doesn't meet you as planned and it is a non show, the account gets closed, and they have to open a new one again. This is pretty simple the person says yes or no. Several times, many people have set up something which is a no-show. This includes me. People don't like to waste their time with people, that's that.