Speeders. What can be done about them? Not talking about the one's that are going faster than light itself, just the one's that are barely noticeable by a small group of people.
Not accusing anyone, but some are using a little lag to make themselves skip around, thus masking their noticeable speed. Pretty clever, but still barely visible.
Heard that there used to be an anti-cheat for speeding, but it didn't work as intended. Speeding and vpning is becoming the norm for sparring. The GMs don't really have any tools to detect this. Since nothing is being done, it now looks like everyone is doing whatever they can to have some sort of advantage.
Again, what can be done? I don't believe that the answer is to hire more GMs to monitor 24/7... Humans can make mistakes, and not everyone is able to differentiate the slight speed boosts.