World of Warcraft: possibility of server-wide buff in the future?
If you play more than one MMORPG there may have been a time when you wanted one of them to have the features of the other ones. This is exactly what happened to gamer Lexorn from World of Warcraft.

In the World of Warcraft forums, Lexorn suggested that the game could "borrow" some features from other MMORPGs. Among these suggestions were the Control Points of Richard Garriott's Tabula Rasa.

If you're not familiar with Control Points, it's where factions are able to control a certain city to the advantage of your race and your faction. His request was:

From Tabula Rasa we need to “borrow�the city stealing/capture system. If no one defends a neutral outpost (Area 52, etc) it will be taken over by NPC’s. Then players need to work together to capture it back! Otherwise no quest turn ins/shops, etc.

Gamer Endarken followed up this idea with his own suggestion:

Why can't you make it so that cities like Halaa (well, pick another one, not Halaa) give a server wide buff to players, if it is controlled by your faction?

That would provide an incentive for players to capture and hold it. For example, a 3% increase in damage while the city is held or something.

Blizzard Poster Tigole replied soon after, saying "That's a cool idea. Maybe we'll do something like that with Lake Wintergrasp."

This would indeed be a cool feature and while it isn't exactly the same principle as Tabula Rasa's Control Points, its application in World of Warcraft would be a nice incentive to foster even more PvP (though it hardly needs encouragement).