i really dont see that as clutter,clutter is when the actual post is filled unnecesary extracts or
doing this

Cluttering signatures
Some members have very large signatures ( I won't give any names here , suffice to say there is a Hellenistic one ). This clutters threads when the post has many answers by the " large signature owner".
I have seen in other forums that the signature only appears under the first answer in a thread, not in the subsequent ones.

Is this interesting, and if yes, can it or should it eventually be implemented ? ( that is, if the forum's "stability" does not get affected)
its quite easy to jump from post to post but a pain reading through loads of quotes/repeats to get to the nub of the matter.or is it your scroll button has stopped working?