Should hotels give 'panic buttons' to housemaids?

I think it is a good move. Shows management taking action and has the interest of its employees in mind. Innovate and shape the future of the maid/room attendant positions.

What is your opinion on this topic? Do you think there would be any adverse effect with guest service etc?

Yes, I think this should be really beneficial for large properties, But are there any available products in the market? Maybe this is part of a housekeeping mobile application.