Don't get off the ship or at least, don't go beyond the port gates.
We didn't want to go on the long coach trip to Cairo because we had done this on a previous cruise. We decided to walk into Alexandria. Big mistake. We have never experienced such intimidating and scary taxi and horse and trap drivers all clamouring for our business even though we did not want it. No one gave up!
And don't get me started on the filth and rubbish piled up the walls. And the state of the walk ways - we have walked on safer mountain paths!
We were soon back on the ship and safety. Oh and we were there for 2 days, needless to say, we did not get off again.