I had intended to bow out of this as there is little pleasure in a war of words IMHO, however .....
Faberge, of course AIBU threads attract strong opinion and posters can expect a rough ride but one assumes that those opinions will be fairly applied to the content of the post and not based on extrapolations which have been created solely in the mind of the respondent.
Firstly, while I agree the title is designed to attract some interest, the first line of the post states clearly that this is floating a thought only, and a bit 'light-hearted'. Cue .... does not require heavy input!
My 16 yo DD 'can't' tell me if she'll be home in time for dinner apparently has been morphed in your replies to the poster having no knowledge of where her child is or what she is doing - and that the child is not respecting any time related boundaries. For all you know she could be studying at a friends house, and coming home before curfew but only when they have got through the work needed. Or working and only able to finish when tables are finally cleared. Or neither. The point is, you don't know and didn't ask
Instead, I have always made a 'proper' meal, which DD and I eat together Somehow this has been read as the OP being negligent about meals for her child?
WIBU to forget about catering for her, give her £20/week and tell her to sort herself out, saving endless arguments this was the nub, most people replied that it probably was being BU, and offered a few ideas .... and the OP agreed with them - reiterating that it was a half hearted thought. !! , How does this raise anything which you consider of sufficient worry to state you are in trouble
As she wouldn't dream of clearing up after herself, washing dishes, etc this would have to be done with the proviso that all meals must be eaten outside the house In my house, I needed to deal with a teen who decided that washing up was an effort more than needed.... she modelled her behaviour on her fathers. The posters response would not be mine (I posted my own solution) but certainly does not give rise to your assumption that there are no boundaries in this home, and no control? At what point did you make that assumption? after reading the title??
Bottom line is that your responses were not to what the OP actually said, but what you thought you read into the situation. Your responses were pejorative, and in a couple of instances actively offensive.