I know you yanks like to go around shooting each other, but if you absolutely must challenge someone to a duel - do be so kind as to use your sword instead.
Well, you see Kif, my strategy is so simple an idiot could have devised it: reputation is adjusted by "votes" so that other users can up or downvote another.
One thing that worked for me in a similar situation was to enforce an "owner" tag or some kind of registry on everything.
Basically, if you set something up, change some configuration, whatever - put your email address on it.
Write a readme.md or wiki or guide too, but at the very minimum put your name down as the owner so that when someone comes along and wants to know if it's safe to change/upgrade/delete, they can find you and ask. If someone leaves, you can do a quick search and get them to handover/write up anything they were responsible for.