Originally Posted by SiM 
Its better nothing is posted rather than someone registering to batman a thread from the 1940s
If the content is relivant to the thread and useful, then I do not agree.
Even someone posting in an old thread to say "thanks" as it fixed their problem - that's a new potential member there.
Spammers posts are deleted and the thread drops back to its proper position so I don't really see a major issue?