05-08-2012, 12:01 AM
It's completely random and isn't based on which skill you're using, so by fishing, you can cast 2-3 times per second, whereas mining is only once per 3-4 seconds. Lumberjack can be once every 5-6 seconds or more. So, you'll see a proportionately larger number of anti-afk gumps from fishing. No simple way to make it so that it doesn't happen, though.