Wow, that's a lot of valuable lessons packed into one page. Let's review:

1.) Littering is wrong.

2.) If everyone respected the rights of others, the world would be a happier place to live in.

3.) Wherever you go, whatever you do, Superman is watching. And judging.

4.) Lock your bicycle if you don't want Superman to steal it and dump it in a pile as a visual aid for a lecture to some other kid on good citizenship.