I have avoided a number of issues just not answering the door. As the song says, if you have a warrant then I guess your going to come in, but unless that door gets kicked down, its not going to open on its own. Knock and talk is a voluntary interaction. When I lived in KC they showed up at my condo a few times but I just didn't respond, they knocked, I casually and quietly went over to look through the peep hole, then went and had a drink to wait and watch for them to get back on the elevator and leave.
Raids are a different boat. The above would have just been noise complaints or heavy weed smells in the hallway, possibly asking about other crimes in the area.