You've got four options:

1. Live with it.

2. Quit.

3. Say something and choose option 1 or 2. If you're lucky, they'll provide an option 4, just be prepared for option 2.

4. Be defiant or passive, don't do it and see what happens.

Red flag? No, not necessarily. There are many positions out there in tech which are 'ra-ra'. Sounds like the company wants it's rank and file to be that representation (which IMO is not a smart move by the employer).

If you're living outside of the US in a workers paradise, this may not apply to you and you might be better off than the rest of us living under an oppressive capitalist regime that consumes people, taking their last breath for that next hundredth of a percent "productivity" improvement.