I want a feature for a video game, and don't care for this 5th grade behaviour nonsense. Either that or then a feature to auto remove me from their friendlist (and they being removed from mine) automatically.
I have people worth of years of playing the game. The suspicious behaviour aside (if someone from my friendlist is changing their names way too often), if they have a desire to distance themselves from the people they used to know, then by all means, at least a feature to solve the issue of my friend list having new names out of nowhere.