Hate to tell you this, but here's a bittersweet solution and response.
http://forums.spybot.info/showthread.php?t=29723&highlight=snoopfree
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Bitter would be the long, five paged thread. Sweet would be the answer to your query.
The general idea is that, SnoopFree is wrong about Spybot "spying" on your screen or taking a screencapture. All Spybot does during execution is display the GUI.
It could also mean a false positive. Possibly (for SnoopFree). Rest assured Spybot is not malware or any kind of that.