I never knew there was a way to scan a document into Illustrator either. You cannot scan into Illustrator because scanning is raster based. You have to scan into PS and then place into Illustrator. An end user would be able to know if this can be done in Illustrator. There's different types and levels of experts anyway.
I think this MRC argument was discussed here in an earlier thread with links to it. It wasn't fool-proof if I recall.
Then there's this....so:
That's still not scanning into Illustrator though. It's converted and optimized afterwards. I am going to try it though, as I don't know of anyone that uses it this way in my profession.