As for the OP not responding to threads or PM's then that is soley up to him, if he doesnt want to respond he is not obligated to.
I personally dont know about other peoples updates or the circumstances to them. I was just simply trying to help explain why it was deleted. It really depends on what you are posting and updating about and how it pretains to the thread. I personally don't hunt those things down, as its not something that is usually reported. If its a problem for you then you are welcome to report them and if the mod of that area see's it fit they will take care of it.
I am not sure which member it is that you are talking about but if say your posting a link to the buy/sell thread which does not pretain to a DIY thread then its already drawing attention. Secondly with a buy/sell issue we are trying to divert the attention and take care of the problem with those involved and it need not be brought up else where, when it is and it is noticed or reported we take care of it. To me its basically adding to a problem we are trying to take care of and we dont need people talking about someones buy/sell problems in another thread (that does not pretain to it in the first place) where it was brought up again, when they are not invloved and it should be kept in PM or let the mods handle it.
If someone wants updates or pictures then they can bump the thread, if they don't get them well that is on the OP for not posting or updating and you cant do much to force them too. If someone new does not know much on the forum or whats going on they can check out the rest of the forum, it is up to them to view what they want to view and find the correct areas. If they need help then they can post in the lounge or comments/bugs/suggestions and they will get the help they need. If they ask a question in another thread you can simply point them in the direction of the correct forum area to post that question. No need to post updates on whats going on with the forum in DIY thread that is about the project in question only.