How much money do you have invested in your bike? If no one else in the building uses their bikes as transportation as you do (especially considering the others hardly move), I'm sure what your bike's worth is much higher than the other tenants keeping bikes in the 'bike room'.
Like psirue said, keep using the elevator until someone says something. Then, if someone from management should address you, use how much money your bike is worth and that you don't feel comfortable leaving it in a community bike storage area as your leverage. I know I wouldn't comply with that.

Trance - was removing your wheel and walking really easier than riding up another street?