I agree it is common courtesy to do your best to give an accurate depiction of your scenario if you're going to ask for help. (Model year/model, etc.)
However, its not that big of a deal if someone goofs.
I am a huge stickler for detail and by nature very organized. I am always aware of posting year, model, mileage or any other pertinent information.
That being said, I once got in a rush and neglected to post a model year, just that it was a 1200.
Someone got all huffy about it and wanted to play Dad and give a lecture.
In my opinion if you've got the time to sit down at the computer and converse with others about a hobby that we all enjoy, you've got the time to say,
" Oh, I noticed you are talking about a 1200 and I know a bit about those, but I could help more if I knew the year."
And if you don't feel like doing that, just ignore the post. Either way the poster in error will figure it out one way or another.
But that's just how I feel. Didn't say anyone was wrong.