If you will go to Elijah's cave suddenly you will see a lot of people that will ask you for donation for a sick person or something like that and as far as i know they all trying to get money for themselves.
Try to avoid them and don't answer them unless you want to donate.
The beaches around Haifa are great but I found the undertow very strong. I'm an average swimmer and was not very far out, maybe 20m, and when the tide was going out I really struggled to get back to the beach. Quite scary experience !
Neighbors seems to change pretty quickly from one block to the next. When you're just walking around looking like a tourist, you can find yourself in a bad neighborhood real quick.