I didn't comment on Blizzard's ill-fated effort at attaching players' real names to forum posts last week because there wasn't an incentive design issue to discuss. But perhaps there should have been.
DDO, WoW, and EQ2 all have bind-to-account/heirloom items that cannot be given to other players but can be transferred to your own alts on the same server. In WoW, one of the uses for this mechanic is to pass along reputation-only head and shoulder item enchants that can only be obtained through grinding factions to your alts once you have completed the grind once. EQ2 allows basically all dungeon loot, along with dungeon and world event tokens, and some faction rewards to be transferred.
Most interestingly, a newly added EQ2 feature lets you short-circuit the lengthy scavenger hunt needed to learn the Draconic languge (needed for epic weapon quests) once you have completed it once. Blizzard had expressed a desire for a similar method for raid attunement quests, but never implemented this feature and, instead, took the easier step of slashing reputation requirements before removing attunements entirely for almost all dungeons.
If you were looking to convince players that they want to switch over to some sort of account-wide identity, the way to do it is not with the implicit threat that someone will find your real world home. The way to do it is to say that publicly linking your characters to your account identity allows you to share certain achievements, like raid attunements or heirlooms. (After all, it's only fair that other players can see why it is that this particular character gets to skip a major timesink.) Then, provide a peer-to-peer comment moderation system to mod down trolls, with posts that aren't linked to an account identity (including your non-identified alts) starting out with less benefit of the doubt.
The real trolls won't care about trashing their account's reputation, but they were equally unconcerned about this when it the identity in question was their real name. For everyone else, you get 90% of the benefit of reduced anonymity with 0% of the potentially serious issues raised by RealID. Meanwhile, players might actually like the feature because it comes with a benefit, rather than a vague and hypothetical improvement to the quality of the forums that might not have been effective in any case.