I agree, Pie. We've had a number of lurkers that finally couldn't take it any more and had to respond. They are usually excellent posts, too.
That said, I doubt if there many who have an Epiphany and just have to start a new thread, right now.
So, not being able to make a posting in an existing thread would deter the urgent desire to respond. But the 24hr wait to start a thread shouldn't be a problem.
Not responding to spam threads, and definitely not clicking the links, would be a help. I doubt if they really give a shit about your smartass insults, they crave attention not praise.