Airbnb Blocking Some Rentals Over Halloween To Halt Parties

San Francisco-based Airbnb said it will ban one-night rentals of entire homes in the U.S. and Canada on Oct. 30 or Oct. 31. Previously booked one-night rentals will be canceled and Airbnb will offer refunds.

Airbnb said it will also look more closely at two- and three-night reservations during Halloween. A guest may be denied, for example, if they try to book a whole home close to their own home during that period and they dont have a history of positive reviews on Airbnb.

Airbnb has taken a series of steps to crack down on parties since last years shooting. Last November, it started manually reviewing U.S. and Canadian reservations to weed out suspicious rentals.

The company’s efforts have intensified as it prepares for an initial public stock offering, which could come later this year.