In Sweden, sweets and ice cream are banned at my kids' pre-school and school through the official system, but then a kid will move and have an ice cream sending-off celebration or an instructor switches jobs and does the same. Also, we just had celebrations for the start of summer vacations, with cookies and lemonade. So the ban is definitely not the complete ban that I would like, since they make constant exceptions for individuals to bring their own stuff and even serve it themselves on special occasions.
Both school and pre-school make it sound like they don't allow sweets, so it's very disingenuous. At least they're not served lemonade daily for lunch, and the afternoon snack is fruit.