A addon that utilizes delays COULD (I'm not saying it is or isn't, merely that it isn't clear) be considered malicious.

That decision is Blizzard's -- they've already told us "delays are bad, mmkay". It's up to the user to decide whether that is or isn't a risk based on their own consideration. The blue post, while an excellent one, still doesn't specifically say anything about Jamba strobing.

I feel the key here is whether or not /follow -- a non-GCD inducing action -- is considered an automate-able action. That's not clear. The specific blue post quoted involved addons that did simple information gathering and did not alter the state of the game. Remember that the WoW API changes every patch -- so something that was kosher last patch may not be in a future patch -- bannable? Who knows. My PERSONAL OPINION is that it wouldn't be, but I'm not going to tell people that if I'm not 100% sure my statement won't impact the safety of their accounts.

http://forums.worldofwarcraft.com/th...=1&pageNo=1#14 (same thread)
Malicious meaning what (maybe an example?)
Oh, say, a button that crashes other clients, or maybe sends misleading chat messages...
Automation is generally considered a malicious activity. If delays are automation, and IF Jamba's follow strobing is considered a delay, then utilizing Jamba's follow strobing would be utilizing automation. (Please very carefully note that this is a CONDITIONAL statement.)