I'm curious how this would look expanded to other genres. My guess?
How to troll RTS players:
1. Create a unit-cap that changes every other minute. If you exceed the cap, all your units blow up.
2. You can create units beyond the resource cost you have. However, once the first units you built over your resources are finished, all of your units stop where they are and begin to die a slow, horrible death while the computer keeps yelling, "FOOD SHORTAGE!"
3. A building on fire sends all of your worker units into a panic until several of them put on red hats and form a bucket brigade to put out the fire.
4. In the case of sci-fi or fantasy RTS, armies that are made up of a hive-mind like group will scatter every time a light is shined on them, and will dedicate most of its units solely to feeding the young, taking care of the eggs, and carrying the queen/king's fat ass around, whether the player wants them to or not.
5. Alien armies, on the other hand, will not attack human armies, choosing to have sex with them instead. And the humans will worship them as gods, because aliens.
6. No matter what unit the player/players build, it will easily be destroyed in one shot from each army's weakest units. Zerg Rushes for everyone!
How to troll "Hardcore" RPG players:
1. The player can change their skills around at any time, for little or no cost
2. Any attempts at stealing or pickpocketing results in the player being arrested and having their hands cut off.
3. Guards are infinitely more powerful than the player, regardless of their abilities or level.
4. The player's stuff can and probably will be stolen due to their constant absences from home, and the armor they're currently wearing will likely be stolen off of them from clever pickpockets. Also they'll probably get a mine or poison planted on them.
5. All dragons or similarly epic random monsters will die in one hit, from anyone or anything. And if someone else kills it, you can't loot it.
6. If the game is an open world, create only three possible endings.
7. If the game is more linear, create an infinite loop where the player never gets an ending. After all, they're only there for the grind anyways.
How to troll "Casual" RPG players:
1. Make a game a hardcore RPG player would like