Neighbor controlling my PS3 or random buttons triggered?

I have a Playstation 3 which I use for gaming and streaming video. Often times, my PS3 is controlled by a mysterious force, which I can only assume is my neighbor. I live in the city in a row house, so our neighbor's living room is likely just one (very thick) wall away.

Is there anything I can do to prevent my PS3 from being controlled by my neighbor's controllers?

I had a similar problem with my PS3, the problem turned out to be dirty controllers.

The effect was much more noticeable when I wasn't playing a game as the controllers were not in constant use but symptoms were very similar, random inputs causing the menus to pop up and navigate the menus, usually in one direction constantly.

The simplest solution was to turn the controllers off once you have started watching the show then turn them back on again once its done. I would try this first then you can maybe look into cleaning your controllers with this question or buying a new one if it turns out to be the cause.

Other simple things to do in order to narrow down the problem is check to see if it happens when you are using a specific one of your controllers by recording which of the two is in use when it happens.