Do u know even what spamming is?
Shares should be opened lifetime at a forum, because they are shares. Reply-ing to a thread that is old is not undig, new users come everyday some see them after days/months, they want to say thanks or to gain one post, depens... in this case this thread is a share, has not been spammed and no dead links or something similar, and in this case NOW u are the one that spamming.