There is a big difference; using this system you could directly facilitate the distribution of data that you do not want to be associated with.
Buying a camera doesn't directly help the creation or distribution of info you consider to be immoral or unethical. Obviously you may want to use a camera maker or ISP that actively discourages such behaviour.
I'm sure you would feel extremely guilty if someone used storage facilities that you controlled to spread CP. On the other hand, I've never felt guilty about buying a camera as I've never let anyone use my camera for such purposes.