I will say when several anon posters post in the same thread, it gets super confusing super fast. Even here I'm like, "ok, which thread post are these numbers?" If thread post numbers are even posted. Go back, re-read those, then try to re-read the orginal post and in a thread that's like 10 pages long and doing that for like 3 people, especially when you are already dyslexic and have to re-read everything 8 times to understand what you just read, times several other past posts, times several members, that's frustrating. At that point I give up and just bow out of the thread. So, thats one of the draw backs of the anon feature. I wish it was more like the anon area of the forum where you are given a computer made up name and avitar (old monster/alien avitars), if it's the same one, is much easier to follow. If that made up name and avitar follows you that is.
I also know many times where 2 anon people will get confused and it will cause a huge misunderstanding that takes a few pages to work out. Seen that too. So, there are draw backs to the anon feature too when more then one poster posts anon.