Please teach your kids some respect

Seriously, how hard is it to teach your child to respect other people's things? To teach your child to stay out of other people's yards unless invited. So we have the best toys on our street, we paid good money for them too! I get very annoyed when I look outside my window and find someone else's children riding around in our Powerwheels. Did they ask? No. Did I know them? No. Did I yell at them to get the heck out of our yard and off of our toys? Hell yes! My 4 yr old knows better than that. I have drilled into him that we do not go into another's yard unless invited, we also do not use their toys unless we are invited over. If my 4 yr old knows this, why doesn't a 7 and 8 yr old? Probably the same reason why a 7 and 8 yr old were playing outside alone, at 7:45 pm, no one outside calling for them, but it is getting very dark and we only have 1 street light on our street and they were from the next street over--meaning they have to walk through a patch of hills/woods/dirt to get over here. So if one of you arelike my neighbors and don't buy any fun stuff for your kids, please go to Walmart and buy something b/c I am tired of your children at MY house playing with MY KIDS STUFF. Seriously, a tball set costs 10$, the shovels/pail about 12$, you don't have to buy them a 400$ powerwheels, just something to freaking play with!
Ok, rant over.