Company I worked for (huge multinational) instituted a privacy policy that covered wages.
Reasonable for a company to do such, and it assists anyone who doesn't want such info divulged without their say-so.
Local management turned it against the people it was meant to protect with an edict that made talking about your pay with others a forbidden thing.
Bullshit, we said. Misuse of policy.
The manager's office had a glass window that looked out on the shop floor. One payday several of us, (not all of us, but enough that they couldn't act) stood out infront of his window in a nice tight circle with a rehearsed silent act. Went something like this:
Pull Paycheques from pockets on que with a >snap<
Open Paycheques with a stroke >rrip<
View personal Paycheque and wait one >beat<
Pass Paycheque left, wait one >beat<
Pass Paycheque left, wait one >beat<
Repeat until circle complete, break-up and go to work as normal.
Never heard a thing about the pay rate thing again.
Eric