Create a temporary stop to the decay of a purge meter.
Make yourself known, and provoke the unwashed masses looking to purge your base.
Could be a structure similar to a drying rack or a bonfire. Load it up with branches or plant fiber as fuel.
a fully stocked signal fire should last a couple of days. Once it runs out of fuel the default purge meter decay could set back in.
While lit a signal fire would prevent a clan’s purge meter from decaying. You could log off go to sleep/go to work and comeback the next day without the frustration of seeing you have lost ground on the purge meter.