(Portland, OR) -- Airbnb is tightening rules to prevent house parties over the Halloween weekend. Guests without a history of positive reviews won't be able to make one-night reservations. Guests trying to make a two-night reservation in a house will be redirected to listings that aren't entire homes, if they don't have a history of good reviews. Last year in Oregon, Airbnb says it stopped over 13-hundred potential parties.