Hi, Gold Leaf, and welcome to the board.
There are definitely things you can do to get your neighborhood back, but it takes a bit of effort.
What happens is the Scientologists basically camp in the offices of local government, schmooze, make campaign donations, and, well, lie about what they are doing and what the opposition is doing.
So you have to set the record straight, which means writing letters, calling, showing up at city council meetings, etc.
In Riverside the Church had the County Supervisors completely brainwashed, but after a lot of effort, most of the supervisors now understand (I think) what happened.
Similar things have happened in other places, such as Atlanta, and in Santa Clara, and some critics showed up at city council meeting, etc to set the record straight.
What's going on in Sunland-Tujunga?
Edit: Also, did you see this thread?viewtopic.php?f=9&t=31295
Tell us about the Scientology facilities there. Sounds like their old mission closed, and they have a new location? Doesn't sound like it's exactly thriving.