There is an ad called mywebface that takes you to its own page from EtiquetteHell and then will keep returning to its page if you do one back arrow. Two back arrows will take you to the page you were previously on and that's not affected by mywebface. Today it happened in the Trans-Atlantic Knowledge Exchange thread and yesterday it was in Similar Email Addresses.
I just opened EHell again in a different window and I did not get mywebface on the same page of Trans-Atlantic Knowledge, so it seems to be random. Can that site be blocked from putting ads here?