These already exist. We're quite literally posting in one of them right now.
You also do not have any real data that says it would become more toxic (if you do, please cite it, not anecdotes real quantifiable data). It could just as easily become less toxic, because players want to not be excluded thus they attempt to get better. Neither of us have any ACTUAL data to back up our claims, so let's not speculate shall we?
This is a common myth that is perpetuated by unskilled players. Look at the best players, ignoring mechanics is not how they achieve top DPS. They do it by managing uptime in intelligent ways but always respecting mechanics. Ignoring mechanics gets you damage down stacks, one shot, or wipes the party thus killing any hopes of doing DPS.Then we would begin to see people ignoring mechanics only to get higher dps. Then we would begin to see people ninja-pulling bosses before the countdown is over only to mess everybody else's opener and get a lead in the dps meters.
Also, if you had done any log review/parsing yourself you'd know that that getting the jump on a countdown actually reduces your DPS. Good openers are good because they take into account ENTIRE party openers and buff timings, and disrupting that hurts you, not helps you.
This is inaccurate and a common mistakenly made point. Just because a parser is official doesn't mean that they're CONDONING harassment. These two events are mutually exclusive. Harassment would still be punished just as it is now.
Defining harassment would be the challenge, not policing/punishing it.
Which of the below are harassment in your opinion?:
"Alien Gamer your numbers are low."
"We need more DPS, 2 people are doing sub 2k."
"Stop being AFK please, we need your help to clear."
"Please try to DPS healer, there's no outgoing damage."
"**** you, you ******* ****. Abort yourself."
Not every group actually checks logs. I mean I know mine doesn't when we pug someone. Be able to talk, listen and be versatile and your percentile doesn't matter. As soon as you compromise on those human qualities, people expect better performance.
Don't be afraid to put your reputation on the line. I pugged my first O3S kill after about 10 hours over the course of 2 weeks of learning. I had never seen enrage, but had seen like 25%, but knew the fight was just the same at that point.
I said to the PF leader, hey, I know the fight front to back, can MT or OT, I haven't cleared yet, but I put up good numbers and if I make a single mistake, I'll remove myself and you can blacklist me for wasting peoples time.
They invited me and we one shot it.
If you're not comfortable enough to put it all out there, you could use more practice on the fight then. Sidenote - I'm on behemoth as well, if you need a co-tank to help with anything let me know just shoot me a friend request.