Editing WoW:Secure Execution and Tainting (section)

===What can be tainted?===

All lua values and references can be tainted - local variables, global 
variables, table keys, table values: 

* When new values are created (e.g. local x = 2) then they inherit the current taint of their execution path. 
* When code accesses secure values, the resulting value will be tainted by the current execution path (but the original value remains clean). 
* When code accesses tainted values, the resulting value will remain tainted and the execution path is also tainted. 
* When code sets global values, the resulting value has the taint of the execution path. 

Function closures can also be tainted, executing a function closure applies its 
taint to the current environment.