Lots of big sites share their contents via 'add to your site' scripts. (scripts, we use on left column etc.. my portfolio script, sport news script etc...) Is this harmful to content owner site? It has back links, and you can not control who will use it. We also know that site-wide links are usually toxic status for Google.
If I shorten the URLs via goo.gl shortener, can I protect my site? ( Of course I would have to change all the URLs: hrefs, img srcs, etc.)