A prime example.

I just attempted to kill Ultima on my tank.
An i88 tank said 'first time here, what do i have to do,' to which I responded 'Just taunt off me at 3 stacks and move out of things. Don't touch the glowing balls when they spawn,' and he said 'xD ok'
I start tanking, I get to 3 stacks, I said 'Okay take it.' He just keeps comboing, no attempt at taunting. Four stacks, I start spamming 'Taunt him' with sound effects. Nope. Five stacks, I Hallowed Ground and continue spamming. Nope. I die and then he moves into place, eats every ability, and dies.

This player should not have been able to obtain that much i90 gear, but it could, because you can get a full set just by logging in every week.