I'm guessing the OP want's to unsubscribe from threads, so as not to receive any more email notices.
This is most easily done from the website.
Click on the Settings link near the top right of the website. When the list (or lack of) appears click on View all Subscribed Threads, just above the list of unread (if any) threads.
There will be a check box next to each subscribed thread shown. You can select/unslect them al by clicking the top checkbox, or choose them individually. Go to the bottom of the list where it says Selected Threads. Click on it, choose your option, and click GO at the bottom of the menu/list.
If you really-really don't want any kind of notification about new posts in these threads, chose Delete Subscription.
If you just don't want the emails, choose Through my control panel only. With this option you'll see all threads with new content when you click on the Settings link, but will not receive email notifications. You'll still get badge notifications in the iPF app on the iPad, if you have them enabled in Settings > Notifications.
If you have more than one page's worth of subscribed threads, you will have to go through each page individually to select and change their status.
I recommend doing this instead of having your account deleted. You might want to participate in a thread again someday, or just visit occasionally to see what's what.