During a US strike years ago, it was also within US law to photograph (up close and personal) former Boeing factory pilots at a Seattle (SEA) FBO, which allowed public access, and follow them home while noting license plates, counties..., in order to list their home addresses and document them as scabs, even if only paid for aircraft maintenance ferry flights (paint shop etc).
Scab name lists never disappear: they are stored on hard copies in case the hard drives fail. What a way to begin or further a career (or shamefully supplement retirement pay from the military or a manufacturer).
Highly-acclaimed Southwest Airlines ("imitated" around the world) has been heavily unionized for many years and is highly successful. Historically, the most profitable US airlines have always been unionized.
If someone has information to the contrary, then show us.