Yeah that's right, so windows must be breakable too. very big story i guess

unrealistic by the way it's not possible to open/smash locked doors, not the looked-thing as is it ;)

but let's go a little more further with the realistic thingy, if there would be looked houses, you need infected spawns within houses. i dont guess on a apocaliptic szenario like dayz your first thought when seeing a zombie is like 'oh fuck, i need to look all doors before i leave this place'

it's not very realistic, imho. therefor we need some possibilities to smash (wooden) doors, maybe by axt, guns etc