Squirrels are the ultimate bird feeder raiders, but raccoons can really destroy bird feeders as well. Or like my good friend in MD, a black bear on her deck!!! So when we put food out that appeals to a variety of wilds it's the 'set the table we will come' thing.
Yea they can make a mess but spilled food gets cleaned up by the bottom feeders like doves.
That wasn't me on the bird feeder, I'm a good squirrel.