They're fine, they're just after your trash. If you get the kind of cans they can't get into this problem will go away. They look like this:
http://www.cityofeastpeoria.com/_data/media/public%20works/Toter.jpg

I.e. tall, steep sides, un-climbable handles, attached lid. Once raccoons come into a neighborhood it's no use having trash cans that are shorter than the longest possible raccoon: no matter how "secure" your lids are they'll get in.