I have only run up and down the street once here, and no one complained, hell I only caught one person's attention, but that was an early Sunday morning when most people were still sleeping.. you just have to know WHEN to ride. Sometimes 2-3 in the morning is even better. When I rode in Alaska before I moved here I used to rip up and down the neighborhood all the time and no one gave me crap, although a buddy of mine ended up running from the cops in his Heathkit Boonie bike.. heh. He had just got the transmission fixed on it so he was gone.
The last place I went to was a HUGE dry lake bed outside of las vegas that everyone takes their dirt bikes and quads out to. Nice and flat for the most part, and miles and miles of space.
I'd suggest finding a place outside of town like that.