I traveled thru several small airports in the past year which were not pre-check equipped but after getting the 3 beeps, I was given a card which allowed me to go thru the WTMD with my shoes on but did have to leave the liquids out at some. I hope this has not been your experience at your home airport LAX. I can't imagine standing on lines at T4 where the lines regularly stretch down the escalator and never seem to move.