Attached Link: http://techpatterns.com/downloads/php_browser_detection.php

 The info is what your browser is sending out.  It is only visible TO YOU.  Apple_UK, I have deleted the photo you posted, since you were concerned that the info may be recorded somewhere, I figured you didn't want your information out there.

These scripts do not send any information anywhere.  They simply read what your browser emits, in your browser, and read your information back to you.  
When you log into Renderosity, you send US more information than the script in the member's sigline.  That is true for any login- or cookie-based site.  

I've attached a link that will give you more information on the scripts.  They are literally nothing to be worried about.

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Knowledge is knowing a tomato is a fruit. Wisdom is not putting it into a fruit salad.