Yes, there's a simple header filter that recognizes the 'detour' and extracts the 'continue' destination, sending you on to the message without even seeing the ad page. I got it off the prox-list group.
code:
In = TRUE
Out = FALSE
Key = "Location: Yahoo Groups ad skipper [12-25-2003] (In)"
URL = "[^/]++Groups.yahoo.com/group/[^/]+/interrupt"
Match = "\0&http://([^/]++)\1Groups.yahoo.com/group/[^/]+/interrupt*done=\2"
Replace = "http://\1Groups.yahoo.com$UESC(\2)$LOG(VRESP $DTM(c): Location: Yahoo relocator <Matched> \0)"
I've used the 'code' brackets in the hope that none of the 'special' characters get eaten by the BB software. There is one 'special' condition for this even if it works, though. Yahoo also tries to send you a cookie when it tries to redirect you to the ad page. If you don't accept the cookie, it thinks it has to try again. This results in a loop that continues until a recursion limit is reached (by your browser, by prox, or by the site. It depends who has the higher limit 
) and you just don't get to see the page.
[ June 17, 2004, 00:15: Message edited by: Baron Munchausen ]