One of the cornerstones of PC gaming is the modding scene. The best games embrace this. The good ones at least let you play with certain aspects of a game. The stupid ones try and ban them outright.
Yet that's exactly what upcoming blockbuster Diablo III has done, an FAQ handed to Kotaku at a recent press event stating:
Q: Will Diablo III include support for bots and/or mods?
Just to clarify, mods won't just be discouraged from this game, they're expressly prohibited.
Blizzard certainly has its reasons for this, most of them stemming from its use of Battle.net to force all users to connect to the internet to play (not to mention the workings of the in-game marketplace) But that won't change the fact that this move will piss a lot of people off, especially those looking for a singleplayer-only experience.
The first two Diablo games are still being modded to this day, and the fact people can tweak their experience (and extend it!) is a big reason they're still being played to this day. Losing that feature in Diablo III will certainly hurt its longevity.
Mike got hands-on time with the game last week; you can read his impressions here.