It's a nice idea but it would be expensive, and just filing the patent applications wouldn't prevent them from implementing them unless you were able to get meaningful claim scope granted. Better approach is just to publish all the information somewhere so they can't protect it themselves.

Right now they're pending applications. It'll be interesting to see what scope of protection they can get if these patent applications are allowed. The biggest hurdle for the US application is a prior Sony patent application describing monitoring gameplay and spectators.