I see a lot of new/temporary users coming and going through this site, often posting incomplete or nonsensical questions that just can't be answered for one reason or another, like this one.
Now by my understanding, (it's been a while since I first started here) the best we can do is just spam their emails a bit until they relent and check the link to see what's going on.
Is that really the best we can do though? What exactly do we send these temp users? Just answers or do we send them notifications when they get comments as well? The question above may be a legitimate question, it may be a dupe, but we'll never know until the user gets the urge to come back and check it out.