Because the graffiti artists are mostly hard core drug addict bum gang members, who shoplift spray paint, and actually catching them in the act is hard to do (even though they carry ladders and masking tape into the yard, work in teams using two way radios, and cell phones, and digital cameras, signaling each other with flashlights), and they can paint a extended height 86' railcar from end to end, inside of 10 minutes, from bottom to top, wearing cotton breathing masks, getting high on the top quality Krylon zylene spray paint
They caught one guy in Wilmington DE, and seized his nearby parked car, that contained several large photo albums, documenting thousands of his artworks, and they gave him 6 months in jail
Being so naïve ... You will probably not even hear them breaking into, and ransacking your own house, as you sleep, the same night as terrorizing a rail yard, high on meth
A FRA cop has an area of 125 miles to patrol ... By the time he arrives on scene they have stolen an entire boxcar of thousands of sheets of plywood ... Some thieve organized crime gangs actually computer hack into a database, and track a particular railcar across country, and plot out a weeks long highly organized plan, employing a dozen organized gang affliates, and haul off with 10,000 cases of liquor and several railcars(s) of electronics ... one Conrail cop was nearly beaten to death with a air brake hose, in premeditated retaliation, all because he arrested their fellow gang member on a previous night
Several 500 lb penetration bombs are still missing from the S Phila rail yard, when they tracked, and stole a USN munitions shipment, right next to a Multiple Rocket Launcher
These are not your average Jokers ! They are not playing games !