I mentioned to someone earlier that taking pictures of set and getting caught is an immediate firing from background work completely. Talking to the 'important people' on set is usually frowned on, and can lead to not working on that particular show again, which I'm not interested in having happen. I try and do my best to keep my head down, though I'm usually a lot taller than everyone else and tend to stick out. Most of the time I end up getting shuffled way into the background as to not be so distracting.