It's better to scrape your front chin spoiler than scrape the bottom of your bumper.
What one of the members did on here was to grab some sand paper and lightly sand the bottom, that doesn't protect it, but makes it look presentable. I wouldn't worry about it too much though.
You could always change your driving habits. The scraping worsens as you lower your car. I used to scrape everywhere when I first got the car, but now I rarely scrape anywhere. Just know your area and approach all driveways/bumps at an angle.