I have a 6th grade son and a hs junior son, I also work at a school, yes these kids, both sexes are distracted by each other. You should hear their conversations. I also own a pool and have many kids here over the years, the boys do "talk" after the girls have left, "wow she was hanging out etc".
I really do not get what the big deal is about guidelines and dress codes, been living with it all my life and so have my kids since they attend uniform schools. It gets hot here in PA and we wore uniforms so I dont get the big deal if your poor child cant wear a tank top bc it is hot...oh boo hoo. And yes I have been to FL and none of us wear tank tops and we all survive. Am I saying never to wear a tank top...NO, if you like them wear them! But if the school says no to the tank top, they are not going to suffer if they have to wear a regular tshirt for the day. Wear the tank top when you get home or on the weekends.
I also realized the other day why the spaghetti strap sundresses might not be allowed, as you know that guy was in the news bc his 5 yr old had to change. Well we were in Mass last weekend and I saw two different girls, not siblings, wearing what would have been really cute sundresses, EXCEPT the straps kept falling down bc the dresses did not fit. And many times the actual dress fell down, and the girls were pulling them up and their chest was exposed. Yes I know there is nothing there but there are creeps out there and regardless it is not a good idea to have their chests exposed. I am sure it is much, much easier for a school to say no to these dresses/tops etc then to have to worry or tell little girls to pull up the dresses constantly.