I went to one bullfight when I lived in Puerto de Santa Maria (Cadiz, Rota) and it was no big deal. As for safety, I didn't see any violent crimes, but lots of car break ins. Don't leave anything in your car where it can be seen. Not even a small towel that might be covering something. A thief would typically use a spark plug or similar tool to break a window and take whatever was easily taken. Happened all the time.