honestly tint will just attract thieves. If you look at a row of cars and one of them has tinted windows, you immediately know that car isn't stock and probably has something worth stealing. The only way to prevent break ins is to not be a dumbass
No bumping where you live
Less bumping in the city or parking lots where your going to leave your car unattended
And if at all possible make your car look as stock as possible. I know this takes away from the "cool" factor, but tinted windows, led shit, vinyl graphics on the windows (steal me stickers) and all that crap that distinguishes your car from everyone elses, also attracts thieves...