10 Embarrassing Things We All Did In Famous Video Games
7. Camping - Any Online FPS

There's a lot of debate in the online FPS world over the viability of camping as a legitimate combat strategy. Camping, in case you're unaware, is the tactic of lying in wait in one specific spot for the majority of a game and picking off enemies as they pass by, often in locations which are difficult for the enemy to identify or reach without being shot at.
The idea is that campers can catch other players by surprise and repetitively kill them until they adapt their strategy, at which point a skilled camper might change to another vantage point and continue their assault.
There is certainly skill behind camping, but it infuriates a large quarter of gamers to the point that most modern FPS games have a "killcam" (which shows where your last death came from) in order to discourage the tactic.
Most FPS players will have tried it now and then, and though it can result in a strong kill/death ratio, it also tends to be the most boring way of playing an FPS, as it's not at all in the spirit of the game and, frankly, is just pretty lame.
Camp for long, though, and in the modern age of voice communication, you're likely to find yourself being chewed out by some 8-year-old kid from Iowa.