Since anti-spam software can't read image content, they have no way to detect that it is spam unless it comes from a blacklisted source. Despite this new strategy, gmail is still managing to catch most spam that comes into my inbox. Since gmail doesn't display email images unless I've given permission, the spam images that do make it through aren't reassembled and all I get is the randomized paragraph and a list of split images.
Once piece of spam got through today, and its absurd subject line made me belly-laugh. It read, as you may have already guessed, "plunge small potatoes". My well-muscled imagination immediately put together a vivid scene of just a forearm and hand grasping a runt-sized baking potato. The potato had a face contorted in terror while the forearm flexed menacingly above a black, rippling vat of water.
Without mercy the hand plunged the screaming potato into barrel and held it under to drown. Soon the potato floated to the top, face down in water as the hand re-emerged with a new, squealing tuber.
Thank you, pseudonymous Francis Hale of firstname.lastname@example.org, for that lovely imagery.