Some years there are few problems, and other years there are almost daily encounters with undesired species. Either way, it's part of bird feeding. Sooner or later, something that you don't want is going to come. Bird feeding, however, almost always provides more entertainment than frustration. That's why so many people are doing it.
Bird feeding is recreation and an important way for people to become interactive with wildlife.
As a matter of fact, it's an introduction to wildlife for most people. Startled birds taking flight from feeders often fly into picture windows because they see straight through them or see the reflection of trees. Throwing finely cracked corn on icy sidewalks solves a slippery problem and provides food for birds. Holiday fruit cakes and leftover dried dog and cat food make excellent feeding alternatives at bird feeding stations. Feeding birds like mourning doves, dark-eyed juncos and cardinals.