http://library.municode.com/index.as...teName=Alabama
---- search for grass, it's the top option
Sec. 12-61. - Overgrown grass or weeds prohibited and declared a nuisance.
It shall be unlawful and declared a nuisance and injurious to public health, safety and general welfare for any occupant, owner, lessee, or person in control of any property within the city or any occupant, owner, lessee or person in control whose property abuts city streets to allow an abundance of overgrown grass or weeds to exist if any of the following conditions are met: (1) the grass or weeds provide breeding grounds and shelter for rats, mice, snakes, mosquitoes and other vermin, insects and pests; (2) the grass or weeds attain such heights and dryness so as to constitute serious fire threat or hazard; (3) the grass or weeds bear wingy or downy seeds, when mature, that cause the spread of weeds, and when breathed, irritation to the throat, lungs and eyes of the public; (4) the grass or weeds are capable of hiding debris, such as broken glass or metal, which could inflict injury on any person going upon the property; (5) the grass or weeds are unsightly; or (6) if not grown as ornamental plant growth, the grass or weeds exceed 12 inches in height. Said property shall include, but not be limited to, sidewalks, city right-of-way strips, alleys, parking lots, driveways, grounds, fences, walls, property lines, privately owned storm drains, and vacant lots within the city.
EDIT: If their grass violates any of these, it's breaking the law.
I'll tell you what, tell the cops i saw a rat come out of their yard. There, now it's against the law.