While it’s off topic I would suggest this mentality has become more prevalent due to how a number of real world things don’t really have a ‘middle ground’, however going into that further is likely to spark a rules violating discussion.
More on the topic, there are some interesting things one can do to reduce the amount of multiboxing without removing the capability or affecting peoples overall abilities. One of the ones I find most interesting is a dual action of increasing the concord timer & toughening up the combat capabilities of haulers, making it less a blink and dead action & more a sustained act, which then requires more piloting skills per account, so harder to multibox effectively. Net output with regards to ganking should come out pretty neutral.