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                     I think there's nothing wrong with it, providing the staff member in question is off tag when participating in guild activities, doesn't use their powers to give their squad any advantage, and doesn't go around saying their guild is the best because they're in it. Pretty much just as long as they act like a normal player when they are on tag, it should be fine. 
                    
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 then everyone wants in, and because you know the people in your guild, those members will be more likely to be hired, making it overall unfairly coveted as a guild to be in, plus when they are being attacked by people using dirty or against the rules tactics, the staff can use their account to deal with it, while if it was another guild, they would need to report the people using dirty tactics or breaking the rules, and the staff might not come do anything at all, or would most likely take longer.