I found out my dad is on tinder
Oh wow! is he single?
No, I'm sure he's having fun with it but it's not fair to my mom.
I'm sorry you are dealing with this. It's wrong for you dad to be thinking about dating if he is married to your mom. Your mom would be really upset if she found out.
I'm going to respond to all his messages to make him look like a pathetic man that's trying to hook up with women on tinder.
Maybe instead of playing with him on there you can talk to him and confront him. Something like this can really ruin your family, and maybe he hasn't acted on it yet.