Or feel free to discuss your own feelings around non-full-thread-reading.
If the OP seems to be in distress, I take care to read all of their posts before commenting in case there has been an alarming development of some kind, especially if serious illness or violence is possible.
Otherwise, I chip in with a thought or opinion as soon as I read something that resonates, and it seems to make some posters surprisingly cross.
For example. OP posts she is sitting in the middle of the road in the middle of the night refusing to go home because she's upset that her boyfriend left her outside the nightclub and thinks he should come and pick her up. And I say 'You can't do that OP, it's dangerous and not worth it to make a point.' And someone replies sarcastically, 'RTFT FFS - she got a taxi and was home ten minutes ago.' And I think, 'But my point was still valid, and was what I had to offer to the conversation.'
I think this is like normal conversation. People chip in with things as and when they feel the urge, without necessarily knowing the full story. Studying a thread carefully and avoiding repetition and deviation is something a bit different, and seems a lot to ask on a discussion forum.