I would like this feature, because I personally hate reading so many threads which sound like answering my query but at last I discover that they are rubbish.
If something could help me which threads would be helpful and which ones will waste my time, it would be really nice.

shabbir is right that no one really cares for maintaining this feature, but that doesn't mean / it isn't a reason good enough, to dump something that would be helpful for others.

Originally Posted by shabbir
if its mod that they have to do it then it would be of not much value.
Why ?? Why no value ??
It might save 100s of minutes of googling for someone with a similar query, no matter who marks the thread as "solved" -- the mod or the member who raised the query.
And, as a mod, I won't mind maintaining threads.
mayjune like this