BART outrage might enrage rush-hour commuters Monday.
A possible protest at downtown San Francisco stations at 5 p.m. could mean major service disruptions, the transit agency has warned on its website.
BART passengers fume at the thought of more protests, which have become weekly occurrences.
Activists have been protesting officer-involved shootings and BART’s response to them.
Demonstrations began in earnest July 11, when activists stormed downtown stations to denounce the July 3 BART police shooting of Charles Hill.
The protesting have become regular rider nuisances since Aug. 11, when BART shut down its cellphone service to thwart one such demonstration.