Cleaning guns in the backyard?

Hi, I don't have a garage, so the only place I can clean,oil, sight-in, etc my guns are in my backyard (sub-urban area). People walk by from time to time and also neighbors can see me. Any one know what the legalities are (in Florida, specifically) ? Of course, I am not aiming the guns at anyone and try to be inconspicuous as possible, but eventually someone might get scared and call the cops... Could anything I be doing considered illegal and get into trouble? Thanks!