Metro has been trying to encourage its passengers to ride bikes to its stations — but the agency also wishes they’d remember to take the bikes home. The transit agency says it has a problem with bikes abandoned at its public racks. So the agency is rounding them up and destroying them.

The idea is that the left-behind bikes encourage more crime, under the theory that a broken window begets more broken windows. And last year 280 bikes were reported stolen at the agency, compared with 207 in 2009.