Yahoo Answers vs. Forums

I used to usually only use Yahoo Answers and the Gamedev chat whenever I had a question about C Plus Plus, and lately a debate has been floating in my mind. Is posting questions on yahoo answers better than posting questions on forums that are related to the subject of the question?
There are a lot of cons to posting a question on Yahoo Answers:

• There's the possibility that nobody will be interested in your question and in about three days Yahoo Answers shuts down your question for no further answers.
  
• You have to request an extension to the amount of time your question is up for answers.
  
• I take back the first con, what really happens is that someone answers your question extremely poorly and after a certain amount of time, since that person is the only person that answered your question, his/her answer gets chosen as best answer and then the question is shut down for no further answers.
• You can't argue about another persons' answer and why its wrong. You just answer.
  

The pros to posting a question on Yahoo Answers:

• There is a reward system. I don't know if it's true that the people that answer questions on Yahoo Answers are in it for the points, but this reward system is supposed to reward those with the best answers. Therefore, yahoo answers pressures a strive for good quality answers that forums don't necessarily.
  

What are the cons and pros of forums then?
cons

• There isn't a reward system? There is usually no pressure to make anyone give a quality response to your question. There is only pressure of being right and having a good reputation on a forum for being right. I totally disagree with this con because I've been to many forums for answers to questions and people do try to give quality answers even without the points.
  

pros

• You can edit your questions or arguments in the post. Want to bold something, add a picture, maybe an embedded youtube video? You can't do this on yahoo answers, but you can usually do it on a forum with HTML editing capabilities.
  
• There is room for discussion. If one user on the forum disagrees with another about some answer, forums make possible a debate where the questioner has a chance to see why a particular answer may not be correct and to keep the heads up for new answers that could be more accurate or correct.
  
• You're question will never expire and will always be there for more answers.

I've been thinking about forums and yahoo answers lately because I just discovered Orkut communities which are much like forums. I joined the C/C++ community they have there with already 150,000 members. I'm also a member of several other forums that have been very useful: CPP for Beginners, Game Dev, and C Plus Plus.