This can't work, what if what we have to say is less than 70 words? What about the simple, short and quality posts? I mean in most of the threads there are right now, I can sum up what I have to say in about 2-3 short sentences that have quality for topics. If it doesn't reach the 70 words, then does mean I can't post it? Or should I just post words that don't matter with the topic of the thread just to reach the 70 word count?
You should stress quality not quantity.