[Bridge] Adding same physical port to multiple bridges

[abhijitk at nortelnetworks.com (Abhijit Kumbhare)]

Hi,

Is there any particular reason why the same physical port cannot be 
added to multiple bridges? Is it because of STP?

If I am not using STP - can I change the code to have the same physical 
port in 2 VLANs? Is that a safe change?

Thanks,
Abhijit