>>64071157
Breaking a window is loud (or at least the sound is very distinctive) and nobody wants to get cut up climbing over broken glass.

If you've got a glass door or a window next to a door so that breaking it lets someone reach through and unlock the door then they make much more attractive targets, otherwise criminals tend to avoid them.

>>64071131
Security film (if installed properly) is another very effective option as is planting some roses or cacti under your windows