Its been said that the demonic corruption present withn the orcs and as of..*inaudiable mumble* the blood elves is passed on to their offspring via feeding, suggesting the taint is present in bodily fluids, perhaps saliva as well...
Id love to see some sort of worgen-esq transition for our draenei girls. Only the outcome would be less Vicious man eater and more bitchy.
oh..oh..oh..or have the fel taint make 'em into real eradar, then have them kill the gnome from the pannels a while back..who clearly placed the elf there as a part of a nafarious scheme.
Oh yes, then the rest of the gang have to fight the were-adar in order, in stormwind of course. Meanwhile Anduin follows some mysterious thing or other arround the castle so that i can somehow encorporate Alexander from FF IX into this decent into madness..
lets look at what we know about our leads here: neither are terribly bright (see "at the ball 8/9" for a great example) and neither of them apparantly have seen a blood elf before. I assume you've heard of a dodo - ever seen one in the flesh?
Just because you've heard of it doesn't mean you immediately know what one is on sight.
I doubt we'll be seeing anybody become an Eredar through casual contact or bites from Belfs. The reason being, is that to be affected by fel magics (at least in the way of green orcs or belfs) is you have to be in the presence of fel magics for extended period of time. Its basically azeroth's version of radioactive waste.