lol many gms and officers would like the freedom to prune inactive players whenever they like, dont agree with the first suggestion as all, griefing is not something that can be handled with technology, as the griefers are gonna find a way around it (there are already slow griefers who remove a few ppl at a time from a guild), the only way to fight the griefers is to use your head and not get griefed lol, trust no one but your own alts for making officers haha :P
good luck