I can understand you want to keep posting garbage at a low percentage. However it's pretty drastic for a website (my humble opinion).
Why ? OK, let me give a practical example :
Day 0 : I open a topic, with an urgent request.
Day 3 .. 5 : Topic approved and available for visitors / members.
Day 4 : Someone reads it and decides to write a reply.
Day 6 .. 10 : Reply approved and can be read...
I just got exactly this experience. Well, someone else opened a topic, and I wrote a reply. When I noticed the message got available, the topicstarter mentioned he got his problem solved in the meantime
-=[ EDIT ]=-
Hmm,. I now understand why (by experience). OK,. forget above question.
Next question
There's another thing I like to get more info about.
When I check my profile, especially "Usergroups", I see something about "Memberships" and "Non-memberships". I noticed, a user might be able to sign up for a certain group. However, no description about what to expect or what it's ment for. Other groups you need to be invited for.
Is there a way to get more info about this ? I couldn't find the desired info about it (.... yet...).