I think the parent comments are saying that it's unreasonable to refuse to return license plates as part of a mail strike. If the postal workers find they have

I think the parent comments are saying that it's unreasonable to refuse to return license plates as part of a mail strike. If the postal workers find they have possession of Tesla's plates, they should release them if Tesla shows up to try to pick them up. Refusing to process mail is one action, but effectively holding the plates hostage is a different action.