Error with anti-gil spam

There appears to be an error with perhaps my clients anti gil spam filters. I get bombarded with gil spam to the point where tells become almost unusable because I don't even check my seperate tells window, because 99% of the time its gil spam, and occurs at least once every 5-10 minutes, sometimes more in the early evening hours.

Since I know SE considers itself a modern company, and isn't just being lazy (world of warcraft has a much larger sub base and yet... somehow they manage to make it so the players very rarely get a spam tell), I must conclude that this is somehow simply an error and not incompetence on SE's part in dealing with the raw volume of gil sellers.

Thanks!