Please don’t. Chances are high that the window is not made of security glass and if you kick the glass in, you’ll get serious cuts in your leg. That’ll range from a flesh wound to life threatening damage in a blood vessel.

Hmm no,

• first oft all: noise. Wind turbines have moving parts, that attached to a building or even worse attached to a balcony creates noise in the whole building. Imagine the rattling of 5-6 ~10 year old, bad maintained, wind turbines.
• Second: the energy output is rather low. A 1,2KW turbine is about 1.2m/3.9feet big. That’s in spherical, cause it has to be able to rotate by wind direction.
• Third: balconies are preferred to not have wind, but sun.
• And last but not least: blades. Every windturbine form factor has (fast) moving blades. If it’s reachable someone is going to stick a finger in it.

If you’re living more suburban and have a windy detached place to setup a small windturbine that’s an option. On the garage or shed for example.