That last sentence is missing from the Wikipedia page. What is the source on it?
https://en.wikipedia.org/wiki/The_Far_Side#Jane_Goodall_cart...
> Frodo's aggression was not limited to colobus monkeys and other chimpanzees. In May 2002, he killed a 14-month-old human child that the niece of a member of the research team had carried into his territory.[61] As a result, the Tanzanian National Parks Department considered killing Frodo.[61] In 1988, he attacked visiting Far Side cartoonist Gary Larson, leaving him bruised and scratched.[61] Frodo had a history of attacking the researchers observing him; Goodall was attacked by Frodo on multiple occasions and, in 1989, the ape beat her head so violently her neck was nearly broken.[61]
https://blog.michael-lawrence-wilson.com/2014/01/19/frodo-30...
Those which are structurally whimsical - well, if you had to deal them as liabilities, then you would have to do it preemptively (it may not be that it's Chimpy that is so brutal - they just can be brutal).