I agree but does it really matter considering the mentality with which threads are created and used?
There's always some anon or two now for their respective general who is ever ready to recreate the nth generation of a thread, complete with boilerplate text and links and recognizable search terms and images; this is performed like clockwork. The only spam that could stop chainposting like that is sheer flooding of the entire catalog from a bunch of VPNs.
For slow boards it is a bigger deal sure, but I recall that even after the trash from 162 spammed /po/ there was in fact a way to restore the lost threads.
I think spam is a thing of the earlier web, much like imageboards themselves; the fact that even these are now hard to spam is a sign of the times.