Since some of them just register and don't login at all, why don't we have this (some ideas):
1. They need to make an introduction within the time they got in, with the highest amount of 3 days or 1 week to make one.
2. Read number 1
3. Read number 2
5. There is no number 4
Jokes aside, this should make it a little easier for us and get to know eachother.