The random generators on the WTMDs will be coming to all airports soon. It was going to be started a few weeks ago but there is a situation where the generator could be adjusted in the field. There will be a set percentage but will not be activated on the WTMD associated with the AIT.
It should decrease the complaints of retaliatory secondary screening but the TSO and/or BDO can still send you to secondary if they feel there is a reason.