You must have realized, that once we have started a topic, we can only delete the first post of the topic but the topic remains there intact. In case you want to delete that whole topic this script may come in handy.
» Instructions
- Open the topic which you posted and now wish to delete it.
- Run the below displayed script in the address bar
- The topic started by you would be deleted irrespective of the replies
» Notes and Updates
This bug has been fixed by orkut. Please browse other working hacks and tricks until we find a way out for this trick.
Gaurav Dua – Orkut Guru – 546 Points 
22, Webmaster and Businessman. Based in Jammu, J&K – India
Gaurav has written 514 Articles, posted 323 Comments.
how can i delete all my comun ities on orkut at a time?please help me it´s really urgent.
@Priscila – Our Orkut Community Manager Can do that in no time.