I'm going to tell my neighbors to move their garbage cans
Are they occupying your side of the fence? Why do they need to move their garbage cans?
Yes I'm tired of seeing their garbage cans on their driveway which has become a nuisance.
If they are not occupying your property then I do not think you have the right to tell them where they can put their garbage can. They may see something odd about your house and they will also not have any right to tell you to remove it. I suggest that you focus on your own house and decide to how you can make it better rather than focusing on your other neighbors.
I don't care, I will call the cops on them if they do not move it.
Well, unless they are violating any city or state laws, reporting them to the police may backfire on you as they are not putting the garbage cans in your property and I do not think it is illegal for them to do so just because you're tired of seeing it. They may retaliate and press charges with you about improper police calls.