I get that posters might not want to read through several pages of replies to a thread, but there is no excuse for not reading the OP’s posts.
There is nothing more annoying than when a OP writes something, the thread moves on, there are updates, and someone comes on to the thread and and responds to the OP which is the only post they’ve read.
You could make it like e.g. terms and conditions when setting up a bank account, so that the poster has to scroll through all the pages of the OP’s post before being able to return to the main thread.