You made the question how can I earn more points. The answer was to ask questions to answer questions to take best answer etc. If you made a question like that then that answer makes no sense. I'd have to see that question and that answer.
To lose points: Don't think of it as losing points, think of it as spending points. Like spending money. It will cost you points to:
1. Ask a question: 5 points.
2. Delete an answer: 2 points. But that 's it.
To Gain points: I looked at this page.
http://answers.yahoo.com/info/scoring_system;_ylt=Au.sJcgfWUL.lritaOjCLKXpy6IX;_ylv=3
I counted seven ways to gain points. I'm not going to type them out here. Sorry.