I don't believe it is a self-deleting board in regard to the ads. Even if you disappear one day or need to change your name, they can't always delete things. Watch what you put in your ads if you don't want anyone to see it in the future.
Things like the WAYBACKMACHINE keeps snapshots of pages from web sites it may have crawled in the past.
For example, you can see here
http://web.archive.org/web/200807031.../www.aspd.net/
(I chose ASPD as an example and a date back in June of 2008)...it still has my banner up top. The link still takes me to my web site, but it's an older version of my site. Some things have changed since then. Scary to think of all the things that are "forever" on the web. So type with your future in mind if you're at all concerned.
I don't know how many ads you want gone from here, but you might want to try contacting a mod and see if anything could be done. If you're only trying to eliminate your digital pussyprint
![Mf Wink](https://cdn-w.eccie.net/images/smilies/modern/mf_wink.gif)
, I doubt they will do anything. If it's a serious matter, that might be a different story. Good luck.