Achievements: The end of alts

I wanted to cut back on playing my army of alts in an attempt to cut back playing WoW so much.

But now my alts are getting neglected because of the introduction of achievements. Why level up my alt by running Razorfen Downs when my main needs to run through it for an achievement? Why bother getting some "easy" gear for an alt by going on to Karazhan when my main needs more rep with the Violet Eye?

So far I've heard two players specifically tell me they aren't interested in achievements. The rest of us are running around doing things we probably never would do for our dose of daily ding.

Maybe I'll play an alt after I become an Loremaster.