Sire, yes it can be used to pull your post & placed on their site. Some evil people will even take out the links you have in your post & the link to the original content.
But, any time you put out a full post RSS Feed you run that risk. You also may loose clicks to your actual site if you have a full feed & people read your post in any aggregator like Google Reader.
Many news site will pull in feeds to other sites but, they only post a partial & give a link to the full post at the original site.
I have a thread about the
Pro's and Con's of Full RSS FeedsAs for your question...The WP-O-Matic is similar to me pulling feeds into Google Reader But, the WP-O-Matic can be set to post them automatically (or you can pick & choose & post manually). Whereas with my GReader, I would need to "take" the ones I wanted to my site.
When you submit your site to RSS Feed directories, they will pull your feed & post it on their site (most have a character limit).
So it is all in how you use the WP-O-Matic.
Like Tam said, to be a good citizen you would not post complete articles & would always give links to the original.
I also prefer to rewrite the post so it is not just a repeat of any other site. We also installed a Plug in that will automatically take a 1 word/words in a post & interlink it to the corresponding TAG. <-That is another top secret that I thought of because I am lazy. Actually, I did it because I use the FireScribe & did not want to go find the tag links every time for inner linking.
I hope this helps a lil. Keep asking questions & I will keep trying to find answers. LOL!
Sheryl