The new Transformers movie is rated PG13 last time I checked, and yet Nickelodeon has been marketing it during shows like Dora the Explorer and Spongebob. My son got a Transformers toy in his Burger King Kids meal as well.

How are they able to market this movie to such a broad range of children when arguably the kids who are viewing the ads really can't see the movie anyway?

Does this bother anyone else?

Just because it's PG13 means nothing. It's just a guide line for parents. I saw nothing wrong with the movies. My 9 year old loved it. The kids can see the movies. I believe a parent has to be with them. At that age a parent should be with them anyways.
If you have a problem with the movie don't let your kid see it. It's your choice.