This fear of the cops is only a thing if you actually believe the cops will respond. Package thieves know the average response time will give them plenty of time to get away. These types of videos just re-enforce that to any would be thief. The amount of news coverage with video evidence showing the thieves NOT getting caught does not give pause to one thinking "maybe I can get away with it too".
I know I've made lots of comments about police response in this thread, but I'm not trying to come across as too negative. However, there's a reason this type of crime is prevalent. Police cannot be everywhere all of the time. At this point in time, I personally would be more worried about the homeowner staging a trap with a shotgun rather than a glitter bomb. That would be legal in Texas.