Can't really advise on any specific ads because the are different on everyones computers (so what you see isn't necessarily what I can see).
If you don't trust giving out your email account, you could always try
www.10minutemail.com
If there are any up there that you object to (due to content or ethics), send me the URL and I can filter them out.
S.C>
PS. Thanks

all the pennies go to keeping BnB running.