I make it a point not to be hacked. Even the most rudimentary precautions will stop most hackers - there's always an easier target. The problem with DDOS attacks is that many sys-admins don't know the first thing about security policies, why they're important, and how to define and implement them. The end user should always be assumed to be insecure (computer-wise, not emotionally). Ingress/Egress firewalling, Intrusion detection/prevention, QOS, and a simple to follow security policy will help keep down the likelihood of an nnocent computer being turned into a cracker's weapon of destruction.
The more computer equipment becomes commoditized, the more important this will be. When DDOS attacks hit phones (mobile or home), cable TV, and all other communication systems, they'll be taken more seriously. Currently the admins are busy putting out techno-fires, or playing with cool new gadgets, and therefore don't have time to take care of the mundane security issues.