I liked the tip in your link advising people to > Attach fake eyes, or an image of eyes, to the back of a hat or helmet. Magpies will mostly attack from behind

I liked the tip in your link advising people to > Attach fake eyes, or an image of eyes, to the back of a hat or helmet. Magpies will mostly attack from behind, so if they think you are watching them out of the back of your head, they will be less likely to swoop or attack. If you do not have a hat or helmet, try wearing your sunglasses back-to-front.