I would advise against resetting the database:
1) There is no reason for it, since the effects of any abuse will disappear the moment Avi "throws the big switch". If anyone can provide an example of how this might not be entirely true, please do so.
2) The friends command will not get off the ground without data to work with.
While it is true that the reasons to vouch/complain have changed slightly,
I don't think your view will be very inaccurate to begin with if you have
used repbot with good intentions in the past.
If you don't use repbot with good intentions, it doesn't matter anyway.
People should still review their lists and make whatever changes they feel like.
It will be less work for those that have used the bot well in the past, and
more of a penalty for those who have not

Bulk commands would help, i.e. if complain/vouch/withdraw took multiple names, and a
"reset {complaints,vouches} command existed. Those people who wanted to
start their lists fresh could do so.