On a more serious note knowledge of of a game really doesn't matter when some users or posts are clear violations of the rules. If you're being an ass and causing drama then any of the mods is going to mod you for being an ass and causing drama, rules are rules it really shouldn't matter if someone from RO,DS,RQ,Rose, or RO2 makes the call for the most part. One of the reasons for the game specific mods was for helping with technical issues,ingame questions and the such.
I,personally, will jump to another section when either the reports from that section have been sitting for an usually amount of time and need to be taken care of, when a large amount of reports start flooding in and the mods that frequent that section arent around and it's getting bad, or if another VM asks me to because they are unsure what to do or feel uncomfortable with the sitution.
If a post is violating forum rules, then the moderation should note that specifically and link to the forum rules themselves in order to erase any semblance of bias. This would also cease any potential backtalk that the VMods are afraid of escalating. But in cases where posts are on-topic and aren't breaking the established forum rules, there shouldn't be any moderation done just because the VMod doesn't like the topic and decides to abuse their mod powers for the heck of it.
What is all boils down to is professionalism and consistency. The Volunteer Mod Program was established to help the CMs manage the community and if a VMod's actions are detrimental to that and/or even making the CMs' and other VMods' job even harder than it needs to be, then that VMod needs to have their powers revoked, end of story. This thread wouldn't even need to exist if problematic VMods were dealt with and issues were nipped in the bud. But that's not what happened and it's disappointing it has taken so many months for this problem to finally be addressed.
Create reasonable moderator guidelines that are consistent across the board and put an end to the unprofessionalism displayed by problematic VMods. Consolidate all the VMods into a proper group and remove redundant groups. Remove VMod status from users that are no longer active. Basically, clean up your act. That is what the entire Volunteer Mod Program as a whole needs.