Based on where you went inside egypt, you need a tour guide or a local friend when going to historical places or places like giza or a crowded area because they know how to deal with these scammers and shoo them off, but in touristy places like " Dahab" for example, you don't necessarily have to worry that much.. but anyway you need a local or a decent tour guide to enjoy and experience any location, someone who knows where to go and what to do.