First - if you are not a member of the war room - WTF warriors? Use the forum search function to read what benis you get from being a member.
Second - Saying thanks is just good manners - those things our parents taught us and which 5 year olds seem to forget for a year - some for a lot longer.
Third - one of the criteria for letting items stick around is how many thanks the thread gets - too little and that means it really wasn't that much of a 'gift' to the war room. Maybe the poster's next post won't be approved.
Fourth - how else will you keep track of all the incredible free stuff you download ? When you open the thread - if you see your thanks there then you know you've already downloaded it - and like most folks left it on your hard drive and forgot about it until you opened the thread again.
Fifth - stop downloading new stuff and pick one thing and take ACTION!