What a mess. Good luck mods, you've got your work cut out for you on this one....
Check the headers on the emails (and post here). If the email acct had been spoofed, it would point to a third party. (which would bring up other scenarios for use of KH ship-to address). If the headers are for the authentic acct., it would be unlikely due to any hacking subterfuge. (The hacker would need to delete all correspondence before the email account holder may discover it, for which the timing is more problematic with such a back-and-forth pattern of emails.)
This will include helpful info about the source and path.
Regular users should do this anyway, with *any* suspect emails, for possible trojans/virii/malware/spoofing.
If the email headers indicate knifehunt as the source, other questions are raised, the broadest and simplest being 'How do you account for this?' Sticking around to clear up this mess would be a better way maintain one's reputation rather than avoidance/departure.
Wolfsnagel has been straightforward with providing screenshots supporting that his behavior was reasonable, and that he thought he was dealing with the 'real' knifehunt. The headers will either further support that, or point in a completely different direction to a third party.
The mods are overtaxed as it is. Good grief.
BTW, links to help with headers (or google : email "search headers")
http://www-cs.stanford.edu/computing-guide/email/headers
http://www.cyberbullying.info/resources/headers.php
This one has more extensive content:
http://www.johnru.com/active-whois/headers-yahoo-gmail-hotmail-aol.html
Typical appearance of hotmail headers (hotmail acct per OP):
