Two people above me responded with a note about tank swaps... a note that was already in the OP...

I believe the OP is likely referring to people that spam provoke / ultimatum constantly. I've seen this for years across many MMOs with mostly new tanks. In WoW I used to see them about once a month - tanks that would taunt on cooldown.

The only MMO where this IS normal for a tank is Elder Scrolls Online - it has no aggro system, you just get a single target taunt that lasts 15 seconds so... you have to spam it and tab through all the adds one by one...

But I see it in a lot of other MMOs instead - in MMOs where it's basically useless, like here, or worse where it can mes you up, like WoW where too many taunts in a short period of time causes them to stop working.

This is just a thing... some people will do it... they just don't understand how the mechanics work... eventually you'll encounter them in every MMO you try.