Personally i agree with GM that here aren't many cheaters.
Here's more buggers and glitchers, but i strongly believe that just a few who are really using 3rd party programs which is easy to determine not coz of blinking or running speed which is most seen in videos but simply when get one 1 vs 1 and dude keeps casting various skills at the same time without any loot around, i made some research recently but not going to point fingers to anyone coz it's really hard to give a strong and decent proof to everyone.
What`s about blinking CN, have u ever had slow connection? I mean one that freezes. Look how it happens, in "blinking" players screen he freezes when game stops downloading data from the server, which is caused by slow connection and high data source reception, but he keeps running, when connection resumes game starts downloading data from the server again and this way everything passes by like in fast movie in the "blinkers" screen, whilst you ,who do not have data interruptions, see it blinking just leaping around. These interruptions may be short like 3 to 5 seconds to cause this effect, especially if player uses TA charm and got slow internet conn. As we know here are lots of PH players who plays in lan houses or internet cafes so they do not have magic internet speed. My point is that blinking does not prove cheating.
As about ones who really cheat they're few, it's nothing to be fussy about it. It's just loads of buggers, and unfortunately they cant be vanished.