Picketing on one's own time is still quite different than "not working during a normal workday". And now we're into situations where the particulars matter, as

Picketing on one's own time is still quite different than "not working during a normal workday". And now we're into situations where the particulars matter, as acknowledged by the more-tentative "may constitute" and "may include" phrasing of your new quote. (There's probably better protection for their organizing and the walkout in labor-organizing law, rather than the non-discrimination/non-harassment statutes you're citing.)