I've parked my bike at a couple of GO stations, never had a problem. At one, mine was the only bike (there was a scooter, but hardly counts). At the other, there was one other bike, a small displacement (250 maybe) late 70s/early 80s Yamaha (actually kinda cool, guy had done a mild café customization). Only problem I've ever had was at Brampton (figures, whole place is one big sh*thole) GO station, where some strung out, crackhead PoS broke into my truck and tore out the ignition switch in his failed attempt to steal it. He got busted a few hours later breaking into another car. The worst part of the whole thing was dealing with GO Transit security. Arrogant, ignorant, chip-on-the-shoulder wannabe rentacops.