@quirk Picketing isn't what's effective about collectively refusing to perform labor. The core is a lot simpler.
Publishing broadly on all channels that no work is happening at the company (or across all employers for that field) would accomplish about the same.
Unless we go back, I suppose, to historical precedents where there was a tangible threat of direct violence and sabotage... but then sabotage is still feasible. I'm not sure that's what you're advocating though.
@lispi314 you could organize a union or guild, and go on strike if your demands aren't met, but what's to stop the company from employing scabs to do the work? If the work needs to be done at an office, your picket line becomes a physical barrier. If everyone is working from home, they could employ scabs and nobody would be the wiser until it's too late.