In the movies, the white cable van is the go to vehicle for discrete surveillance. But, in real life, no one could ever use such and obvious ploy to spy or "surveil" anything. My girlfriend and I realized this the other day when we saw a few cable trucks parked across the street at a neighbor's house.
The reason is that (thanks to the movies) most people get suspicious when they see almost any kind of van parked near their house. I know that I, personally, stop all activity, start watching them through my blinds and tone down my inflammatory rhetoric.