Me said:
Stop complaining. This is called progress. It could be worse. There could be some kind of workable public transportation system that would allow the riff-raff to traverse freely through your perfectly pristine planned community.
I hope you're meaning that in a sarcastic way. :-X
It is a fallacy that mass transit increases crime along the route. It actually increases property values in areas near (not next to) transit stations - because people value convenience in the commuting options. Look at the property values in Pleasanton vs. Livermore (one has BART, one does not) or Clarendon vs. Reston (at the present, the Metro extension to Dulles is not complete). For heavy rail, you could compare the values of Evanston or Naperville, IL to any of the suburbs further away from the commuter rail stations.
NIMBY folks always trot out that tired argument (e.g., folks in Marin county, San Mateo County, Beverly Hills, Tyson's corner) because they don't want the alignment near them. Its the same reason that people try to make BS demands like a subway vs. cut and cover or elevated alignments.
You don't see folks in Oakland or Richmond getting on BART to rob people in Orinda or Walnut Creek. You also don't see folks from the high crime areas from across the Anacostia in DC getting on the Metro to rob folks in Tyson's Corner. Nor in LA will you see folks from stations in downtown get on LA Metro to rob folks in Culver City. Likewise, folks are not jumping on the subway in the Bronx to start trouble in midtown Manhattan.