And just another technical question:

Is it still valid to classify Ink as a mass murderer? "Mass murder is the act of murdering a large number of people, typically at the same time or over a relatively short period of time." (cf. http://en.wikipedia.org/wiki/Mass_murderer)

Has he not gone beyond the break-even-point to call him a serial killer? "A serial killer is traditionally defined as a person who has murdered three or more people[1][2] over a period of more than a month, with down time (a "cooling off period") between the murders.[3][4] The motivation for killing is usually based on psychological gratification." (cf. http://en.wikipedia.org/wiki/Serial_killer)

Nevertheless, I have to admit that this definition lacks a solid mathematical foundation as the break-even-function is likely to have some discontinuities - e.g. "three or more", "cooling off period")

Ah, just more and more questions...