Random events are short interludes that occur during the game, requiring some form of player input. They were introduced to deter players from using automated programs, known as macros, autoers, or bots, to play the game with no human interaction. The use of such macros is explicitly forbidden and can result in the permanent ban of accounts found to be using them. Postings in the RuneScape forums by Andrew Gower suggest that random events were designed not only to hinder macroers but to alleviate the monotony that can occur while levelling skills for long periods of time (referred to as grinding). Some random events are simple, requiring a player only to click on an NPC or to leave the area temporarily; others require more sophisticated actions from players, who must respond to these events quickly and correctly to avoid a negative effect, such as being teleported across the map or taking damage. Players are usually rewarded for responding correctly to random events. Two random events have been removed from the game by Jagex. The tangle vine was removed almost immediately after being introduced as it was deemed too dangerous to players, but was reintroduced as part of the construction skill for player-owned houses. The Dr. Ford event was removed for causing graphical problems within the game program.