To make my crime less exciting, I can add that the rule isn’t about the birds really. We have recently developet rat problems, but: a lot of people feed birds by dumping sacks of bread which the rats eat. And on top of that some rat activists (yes) proceed to dump huge piles of food specifically for the rats but claim to the law that it’s bird food.

So it’s “forbidden” only as a technicality to be able to prosecute rat feeders. Bird feeding, and especially direct feeding, they don’t care about.