I live in on a public street and even though we are in an enclosed neighborhood, the townhouse neighborhood, which is on the other side of the hill (and our main street does not connect to them, they have to walk over the hill to get to us) always parks in front of our houses. It gets worse each year, and with them comes their trash (which they do not hesitate to throw in our front yards or on our streets) and their crime. We've had our cars broken into, a neighbor had his house set on fire (from the outside that faces the townhouses) and our homes broken into. All this starting when they started parking on our street. So yes, not only do I and my neighbors lock our doors, but we started putting up fences if we didn't have them already (our neighborhood is shaped like a T so the corner houses that have yards that face the street didn't have backyard fences but now they do) and locks our gates. I just recently put a lock on my backyard gate (the door that faces the street between my house and my neighbors) because I got tired of finding it 'mysterious opened'. Like I said, all this started when that townhouse neighborhood started claiming our street as theirs. They've even gone so far as to argue with us that they have more of a right to park in front of our own home than we do. With these kind of people in my neighborhood, yes, I make sure ever lock and window is secure whether I am home or not.