Move Posts/Topics to a new User/Member?

Ok, before everyone starts to shout at me please read on and you'll understand.

More importantly, I apologize if this has already been asked before.  I did a smallish search and didn't come up with anything.

1) On our forum, we enforce new members to use their first and last names when they register.  I'm not so naive that some folks will enter in a bogus first and last name, but overall, most people have welcomed the extra perceived security, and go along and enter in the right stuff.  In general, this has worked very well for us.

2) However, we migrated from that "other" BBS, those who had registered prior to our updating to PunBB would not have accurate profiles.  If anything, our problem hasn't been getting new members to use their first and last name, it is the current members we have now that seem to be slow on the stick.

3) When I get the chance, and I see someone online whose profile isn't updated, I send them a nice, but terse email telling them to update their profile.

-- In those cases where we have a new member register, and it's obvious they used something silly, I generally delete them on the spot, assuming they have NOT posted to the board yet.

-- In those cases where we have a new member who has registered, used a silly first and last name, or, it is a member who hasn't udpated, we send them a fairly terse [but nice] email telling them to update.

If they haven't updated, my only choices are to:

1) Ban them [which usually gets their attention]
2) Delete their account entirely.

As you can see, banning is something I only like to do in those cases where I have to hit'em over the head to get their attention.

However, here is the problem.  I'm sure there will be some who just won't oblige, and even if I banned them, they'll just never bother to do anything at all.

-- In those cases where I've got a member who posted, I don't want to simply delete them, because then I'll have a bunch of posts who would belong to a "Guest".  I would prefer to have those posts assigned elsewhere it it's doable.

So, which brings me full circle to my question ....

Q: Is it possible to write a Plugin, or MOD, which would allow me to pick a Member, and "Transfer" those Posts/Topics to another Member/Admin [such as myself] ??

I recognize there would be some hurdles here ... mainly the potential for post id's being the same, etc.

If there was a Mod/Plugin such as this, that would be really cool.  I could just run the Plugin, enter in the person I want to transfer "From", and enter in the Person I wish to transfer "To".  It would automajically move all Posts/Topics/Replies over to the Member I chose.

Then I could delete that person entirely, without having to have any stray posts/topics hanging around which were assigned to a "Guest".

I hope this make sense.

Does anyone here have any ideas, or other work arounds would could theoretically accomplish the same thing? I'm not sharp enough to build this thing on my own, so I'm asking [begging?] for someone to help me out.

Thanks in Advance!