Agreed! If possible, do set up one good and fair system to allow spreeists & spree organisers to vote only once for every joined spree especially in BP, Wts, Overseas spree, to prevent "unfairness".
At the same time the votes and comments left by one should be "anonymous" to the rest, except the moderator, so that everyone can voice their experience truthfully. This also allow moderator to track back if any false claims are made.
Hope moderator can help assist. Thank you.