You have common sense. All the people saying just bring it inside, and maybe no one will notice, especially since you have already been told no, are clearly more concerned about bicycle discrimination or some such than your livelihood. Unless you are in a union, NY is an at will employment state. You can be fired for not being a team player, voting republican, liking disco music, or just about anything besides being a member of a protected class. Being fired for insubordination (which is what doing something you were told not to do is) would be to easy. Don't over think it man, the post is away from the actual handicapped spot, in view of reception and in a private lot. Lock it up and don't worry about it, man.