Just caught up on the posts here.
My two cents that no one asked for: I am (was? Fallout 4's fault.) an avid Destiny player. *insert Number of hours, things accomplished, stuff no one cares about, etc. etc. etc.* I've been playing since the Alpha, and I have to admit that DGAF is the greatest when it came to grouping up.
With KF, however... I can group up with everyone and do the NM raid all day to a point. Some mistakes can happen, and we can talk someone through it; no problem. I've been both the newbie who knew nothing and the veteran calling out runs.
I have yet to touch HM. And with the current setup, I don't want to.
I can (and have... multiple times... ask iRAWR) make mistakes; when those mistakes cause the entire group to wipe, it makes it more difficult for people to want to keep going. When those mistakes happen at the beginning, it's even more soul draining. I don't want to be 1 of 6 and cause the group to throw away 15+ minutes because I made a mistake and we have to wipe. And then it happening again and again.
I don't want to be a burden. I don't want any of you to come back here and go "Instant__Vintage is a scrubby scrub who can't do XYZ and you should never group with him." I know (hope) that none of you will say that... but I don't really want you to think it either.
I think I'll tackle HM at a lot later date, possibly once I hit 310 (at 306). We'll see.
Sorry, Bungie. I can't waste other people's time.
To pivot off of this, and add to all the other excellent comments - please consider the opposite side of this coin. If someone is in your group and is inexperienced, be patient as there are several mechanics in each encounter that feel quiet alien at first, and it can take a few runs to get a feel for it. It can be frustrating for those more experienced, but it's really difficult to learn with a group that is expecting perfection right away. Learning curves and all that.
I mention this because on my second raid run, we had one person in the group that really started yelling at me later in the raid. I was still learning the mechanics and goofed up at Daughters/Oryx a couple times and felt bad for the wipes, but felt like complete shit after being berated for it. Everyone knew it was my second raid but I took it on the chin anyways. It was so unpleasant I haven't run a raid since. (No idea who it was, was with DGAFers and some of their friends; not pointing a finger, more commenting on the experience as a whole.)
I have a friend who got TTK a couple weeks ago and will be ready for King's Fall this weekend, and I am hoping to run with some very patient DGAFers for it.