You are far more likely to blind an innocent person, don't do it. They require too strong of a laser and you are going to be pointing it at reflective glass. There are easier, cheaper, safer ways.

The cat toy is not strong enough.

You're far more likely to destroy your own eyes. A lot of old laser scientists have permanent vision damage the way woodworkers have missing fingers.

Since i damaged a smartphone camera with a laser i can tell you, the damage are small black holes where the laser was visible. It would take loads of effort to destroy it in a significant amount. You would have to run (fly) around and shine from every angle.

The $50 version he mentions isn't gonna do much.

It takes at least 5mW

The sunglasses won't do shit against modern facial recognition, let alone gait and ear recognition.