Fear and holds etc. definately reduce Fury as you are not contributing yourself by attacking.
However you still build fury by being attacked, so in a group of 10 or so enemies your fury will stay high 
(however if stunned/held this isn't ideal :P )
Fury built decrease overtime, pretty quick i might add. In PvP anyway, its very hard to get past the 20% fury mark. I did once however one shotted a troller with a 90% fury bar filled and Knockout Blow :> (i was fighting a groups of npc in Siren's Call before this person decided to toy with me). Granted, his health bar was not full, the attack i've done with that much fury built took out nearly 80% of his health bar.
Ahh how i wish i could build fury as fast in PvP than i do in PvE.
fury will build faster in pvp in i7
Defiant's GoEH/MILITIS METUS
That may be what statesman said, but i can assure you nothing has changed on test as far as fury per hit in pvp is concerned.
If a brute is in battle lets say with full fury
and someone uses a fear technique on him lets just say intimidate in the presence pool.
is that going to reduce his fury if he does not attack or if he is unable to launch a attack while hes affected.Fear renders him unable to take action while under its influence?
if so does the same apply to hold/stun
"an eye for an eye can only lead to blindness"
"am i a clown for wearing a smile...or are you a fool to try and stop me?"
Degzy_G ProductionZ inc