It would be a great opportunity for someone to sell a "Bite Me Trump" shirt. Supporters would wear it for its litteral meaning and opponent would wear it for the sarcastic meaning.
Also, pirates who like teethy BJs would wear it so people know what they're into.
If there was only one pipe or doesn't really matter if there is a screen or not. If the pipe had a cover she would have still been stuck on the bottom and no one likely would have been able to get her out of the water. If a second pipe had been there the pressure wouldn't have built up enough to suck her in.