That lifetime warranty thing may be a great idea. Window tint on off road vehicles tends to "streak" from the dust scraping on the windows while rolling up and down. Eventually, it gets bad, or so I've been told. If they cover any an all incidental damage under that warranty, it's a steal. Especially because tint will eventually wear out!
The difference between stupidity and ignorance. Ignorance is doing something wrong and not knowing better. Stupidity is knowing better, but doing it anyway. Don't be stupid!