This is reprimanding for the
content of the message, not the
scope of the code which would have actual security implications. Furthermore, it is a warning about not violating an actual company policy. This is not far off from the scope this pop-up tool is designed for. While it is clear that this was done as a response to google hiring this firm to dissuade folks from organizing, I could argue that it could be done to warn managers not to use the firms presence as permission to violate a specific policy + law. IANAL but this seems like extremely grey legal area. For example, this could be aimed at managers to remind them that even though this firm is hired, they cannot enforce a ban on organization according to that specific policy in the handbook. I think that's an appropriate use IMO, it would save the company some serious money and headache if it stopped a manager from illegally retaliating against organization.
I would not characterize this as evidence that this person is a security risk. It takes existing culture of google, including past incidents like changing the default desktop wallpaper for a protest that was happening, etc.
Also if this is true it is totally insane. Sounds like intimidation tactics to stop exactly what the pop-up warned against.
> They also dragged me into three separate interrogations with very little warning each time. I was interrogated about separate other organizing activities, and asked (eight times) if I had an intention to disrupt the workplace. The interrogations were extremely aggressive and illegal. They wouldn’t let me consult with anyone, including a lawyer, and relentlessly pressured me to incriminate myself and any coworkers I had talked to about exercising my rights at work.