You laugh...
Our plumber told me a serious story about his son, who had some kind of recurring headache. Someone told them to put something under the kid's pillow (I forget what) and that when the kid next awoke, the first person he saw would be the source of the pain. The kid awoke and saw some uncle... the family resolved some old business with the uncle or whomever and the kid's pain went away. Next time we see the plumber I'll try to pin down this story more...
A few common ways to ward off the evil eye (malocchio):
•Making the first-and-pinky finger-extended gesture at the ground (wards it off like a lightning rod). This gesture pointed AT someone has the connotation of GIVING them the evil eye, or implying that they are "cornuti" (cuckolded.. which is almost just as bad and offensive-- you don't play around with this stuff in certain circles/neighborhoods).
•Keeping a "horn" amulet. This could also be stroked at the time for extra efficacy.
•Scratching of the balls (for men).
•Supposedly analogous, scratching of the (left) tit (for women).
You'll think this is funny but old habits die hard. My DH frequently (and -only somewhat?- sarcastically) will make an exaggerated (for comic effect) ball-scratching maneuver if anyone mentions a bad situation, especially death. I'm not sure if he does this more surreptitiously when the context is serious or not.
For the most part people attribute these superstitions to the South of Italy. All I can say is, we went to Venice with some American friends of ours. One of the ladies is, objectively, extremely beauty-compromised (or whatever PC word might pass for "ugly"-- a great gal, but appearance-deprived). As we entered a hole-in-the-wall pub I (fortunately I alone) noticed the regulars at the bar instantly drop their hands to their crotches and start scratching. The idea of "witches" and "evil spirits" still circulates here to some extent. Nothing overt or untoward happened, and we had a great time at the pub, but I still remember the communal scratching.