Would you please consider the possibility of adding a byte count indicator to the top of each thread? It would not need to be precise, just something to give a forum reader a rough idea that IF they click on a given post/thread, this will require ___ data ( whatever rough number, a few thousand bytes or a few hundred megabytes as the case may be) to download via their given ISP connection.
In an ideal virtual world everybody has unlimited data plans with no concern for such circumstances while other people are on a monthly data budget and could benefit from a way to LOOK_BEFORE_YOU_LEAP so to speak before clicking / reading a given post or thread.