I know the more common term is petticoat but they look more like beards to me.

I really like the looks of Washingtonias when they're not trimmed. The native ones in the desert look really beautiful in their bearded glory.

I am considering planting a filifera and only trimming enough to show off the fat trunk at the bottom when it gets large enough. The old fronds make good homes for bats and owls but also palm rats! Ugg! I have seen fruit tree trunks wrapped with a wide strip of flashing to keep rodents out of the tops. Since palms' trunks don't increase in circumference after a certain point I would think the flashing would work on them as well.

Pondering.