I can also think of other situations where local paranoia sets in and one might want to taint data, for example when reading in data from a file or from an email, and it (possibly) hasn't been scrubbed correctly. In such situations, placing a taint() call in the read routine can be interesting.

How does your module manage the Too late for -T at ... error? Must the make test command be run special or must the Makefile be hacked to enable tainting?