Maximum baud, serial communication

What happens if I set the maximum baud on a serial communication? I see it's 2,000,000
Does the response time decrease or what?

I would like to know the consequences and if it can harm something.

Things happen faster at a higher baud rate.
The only thing that could happen is more transmission errors.

Try it, you won't break or damage anything.

You can get data in to your system faster than your system can handle it.

I would like to know the results of your experiment also.