In addition to what Alex said about reporting bad posts, I'd like to add that it would be even more helpful if everyone avoided making the bad posts altogether.
If you want to thank someone for a topic, you can press the "Thank You" button in the bottom right of their post. This can only be done in the first post of the topic. If you want to thank someone for a reply that was made, you can add to their reputation by pressing this button:
Under the user's Avatar and details.
Thank you for your cooperation!