I think the biggest issue when looking at rules is determining where the fluff/flavor text ends and the rule begins.
Stating that a someone strikes out against their allies, deals with a huge percentage of the battles with this particular rule and lends to better visuals about what happens. But, the rule is explicit about how it works, regardless of what the fluff/flavor text actually is.
Also, I thought I read something in fluff of one of the characters and mindshackle scarabs came into play. Possibly Trazyn? Will need to look for that but I thought they struck out at whatever, basically going crazy, and crazy people can definitely hurt themselves.