I agree with 2shoes' last post, especially "as for ASD being very dominant on the topic, well someone with a child with ASD can still advise about DLA or toilet trining and some with a child with CP can help with staments and nappies.....we all can help each other so (no idea what I mean but hope you get the drift) "
so I agree that too many divisions will cause, well, divisions.
But the teens thing seems to be needed and I think it makes sense to move disabled parents in there too. I think whatever 'group' sub-division makes things easier for people makes sense, if it helps to sort out the relevant threads, so grouping by age or type of person does, cos it relates to subject matter.
But sub-divisions based on niceness/ heatedness just don't make sense. As 2shoes and other long-standing members have said, there don't seem to have been many problems with people on the SN board - it's not like AIBU - and I haven't noticed anyone being hounded off either. If it has, I suppose the section in general might not be right for them, but I'm not sure a sub-division just for nice things would make that any better, or indeed work, for the reasons many posters have pointed out.
If you divide by something concrete, like age or subject, people know what will be there and it makes it easier (but too many subdivisions makes it complicated and divisive).
If you divide by something subjective, it is much harder and would, IMO, just confuse people. Isn't the board fulfilling its function as it is? If so, why mess with it too much? Just my opinion