For those who say that Moderators do indeed need good skill to identify hackers: You all do make a very logical point.
I'd just like to remind everyone though, skill does not equal experience. Heck, I've played since 2012 (but never interacted with the community till a much later date), but yet I'm still somewhat horrible at the game. Even though I do not have much skill, I'd bargain to say I have a somewhat fair amount experience.
With such experience, comes with a better, more accurate chance of identifying hackers and the likes of such. Yes, being good at the game may help in the situation of identifying a hacker, but I believe it is more dependent on the experience of the user himself.
All in all, there are more important factors when coming to choose a Moderator.
Experience, maturity, ability to output that maturity, etc. > In-game skill.