NAH

You are right that that is not healthy or safe behavior, but why the punitive response? It doesn't sound to me like you told him why he shouldn't do it, other than a likely weak from his perspective argument about how it's dangerous for the creepy strangers. You should tell him why there is a consent age in the first place, and explain why his behavior is dangerous for him. And you shouldn't punish him at all. You are in the wrong to punish him, even if you have good intentions, providing you never explicitly told him not to make a Grindr account. I strongly suspect telling him not to do it again and otherwise imposing no punishments will be more effective parenting than imposing draconian punishments.