Used plenty of 'squat toilets' in an Eastern Hamam from time to time. Never have come across anyone using the facilities in the in the street. Probably would get arrested here for that sort of behavior. On that note, I will say I've never been sick (knock on wood) other than the occasional cha-cha every now and then. Maybe something in my diet/water. Even the real sh|thole hole-in-the-wall looking restaurants must have some sort of reasonable sanitation standards.