I use my main blog for posting movie reviews. Every so-often I get a request from other sites / blogs that they would like to share one of my reviews with their own blog readers by duplicating the content and posting it themselves on their site. They are happy to credit me as part of the review and I would allow them to editorialise it to whatever degree they like (if at all). However, I'm now a big concerned that they will be getting penalized in SEO terms for duplicating my content, despite my giving permission. My posts will have been indexed by the site engines before they get posted elsewhere, so I imagine I would be identified as the original poster and not be penalised myself, but I worry about the effect it has on the other blog sites.
Is this a valid concern, or as I'm only a small-scale blogger (as too are the sites wishing to use my content), is it not something that I need to worry about. Should I tell them they can't use my content because it will harm their own site rankings if they do?
The same question could be asked about blogs who aggregate content from numerous sites. None of them are 'content farms' in that sense, but the content is duplicated from elsewhere. Anyone have any knowledge in this area?
The blog I need help with is trioxin.wordpress.com.