The highly-publicized outbreak of E. Coli at Several Taco Bell restaurants has been traced - very, tentatively-to the shredded lettuce the fast food chain uses in so many of its dishes.
The question that comes to mind is this : Given the circumstance that this self-same lettuce is probably on supermarket shelves all over America; that shredded lettuce is a common ingredient in restaurants that sell Mexican food (and sub sandwiches) , why hasn't this outbreak affected anyone other than patrons of the Taco Bell restaurants ?
The first answer that comes to mind is deliberate human intervention; eg: an extortion scheme, a revenge plot , a little do-it-yourself terrorism , a "reality-challenged individual" (formerly known as a "friggin' nut job") ......located somewhere down the distribution chain : so far down the ladder as to be almost "invisible" to the corporate eye.
I'm told (informally) Taco Bell has a comparatively rigid employer/employee structure: long lists of do's and don'ts; rigidly scheduled rest breaks ; much more training than one might expect in a low-wage job;and very close supervision. They also have rather brisk employee turnover - which I've heard - seems to come as a surprise to Management.
I hope my idle speculation on this is wrong , and there is a more (excuse the expression) palatable answer to this "mystery" !