Spawn camping is a practice where a player waits near precise spawn points to kill enemies as they spawn. This is usually considered to be poor sportsmanship and some players even perceive it to be exploitative of the game itself. Most team-based games have some kind of protection against spawn camping, such as a one-way door that only allows players to "leave" the spawn area, permanent AI defences or perhaps a timer which kills enemies if they spend too long around the spawn area. Games with capturable spawn points will often leave some spawn points without this sort of camping protection. Spawn points for game objects are often abused in a similar fashion in game types such as role-playing games.