For those of you who know content curation & their respective tools...

How is content curation a potential danger/pitfall?

I'm researching/writing up a piece on this, and wanted to get some further thoughts. My thoughts so far...

-Original content is key focus for new/growing site blogs
- When and how for posting "curated" pieces: attribute to author, always add your original thoughts, 100+ words of original content
- If you post curation pieces, at most, 25% of the content you produce should be that. IE a weekly curation blog roundup
-Dangers of relying on curation which can be easy to do "I don't have time to make an original post, let me throw up this one that I like from someone else already on the web"
-Dangers of google penalties for any duplicacy?

What are the good things about curation/how can businesses use them well?