Here is the Official response that is being posted from SETI by Director Dr David Anderson:
Dave:
We zapped a couple of bogus 500K WU accounts and there'll be more to follow.
Here's the message we're posting on our boards.
Feel free to send it as you like.
-- David
Some SETI@home users have found ways to "cheat" - to get credit for work they didn't do.
We know that individual and team statistics are very important to many of our users,
and we'd like to keep accurate statistics.
However, our manpower is limited, and our top priorities are
1) looking for ET by finishing our back-end data analysis and
2) developing BOINC, the software basis for future SETI@home projects,
which is designed to be highly cheat-resistant.
But because of the recent increase in cheating, we're going to start investigating suspicious accounts.
If there is solid evidence we'll remove credit from the account and its team.
If you suspect someone of cheating, you're welcome to email me. I can't guarantee that we'll investigate that user,
or that you'll get a response; we'll do what we can.
The effects of this crackdown will soon be visible, and it will hopefully minimize the impact of the cheating problem.
Please bear with us until BOINC is released. (BOINC is open-source, so programmers can help us by
evaluating its cheat-prevention system; the code is at
http://sf.net/projects/boinc).
David P. Anderson
Director, SETI@home