How can using guest bloggers HURT me?

[Travis-W]

Hi Mozzers,

I want to start accepting guest bloggers on my site to create content.
What potential pitfalls should I watch out for?

Should they only link a certain amount of times to their site? Per article? Per everything?
Ratio of followed vs nofollowed links?
Should I not link to "hazardous" sites I don't want to associate myself with?  How can I identify a site that will hurt my link profile?
What's the best way to make sure the guest bloggers aren't plagiarizing?

Thanks!

[William.Lau]

Valuable content. That is it. Allow ONE link to their site and keep other links that are actually helpful.

Use CopyScape do check plagiarizing.

But to be blunt guest bloggers are only the quality you look for. I suggest looking for other sites where they have published content and figure out if they are worth the content.

You should know when you have a REAL guest blogger or just another spammer with spun content.