Long trails of toilet paper blew gently earlier this summer from the trees in the front yard of Bixby Knolls resident Nathaniel Duberowski. Keeping their senses of humor, Duberowski, 17, and his father David used ladders and poles to remove the damp tendrils allegedly tossed among the branches by classmates from Valley Christian School in Cerritos. No in-kind revenge is planned.

