Hi Ash,
My view is that we all live in a world in which we are bombarded with advertising from morning to night, on the TV and in the papers where we are doing our crosswords. Yes, they can be a bit frustrating (except if they are the Brook Bond tea ads or Paul Whitehouse selling insurance) but over the years I've learned to take them on the chin.
If they serve to keep this great site cost free to users, that's fine by me!