I was a professional car audio installer for the last 5 years or so. Hot glue is used extremely frequently to affix and repair things. Frankly, I used it more than CA glue. This is special hot glue with a relatively high melting point. The holes for the tweeters in the ABS are a friction fit, the hot glue is just for reinforcement. Plus, I don't roll the windows up unless it's raining. They're down when it's parked. If somebody really wants to get into the car, they're going to get in. I'd rather that not involve shattering irreplaceable windows. I don't keep anything valuable in the car.