Yes, it's an unfortunate state of affairs that even if there is nothing wrong with your documents, you may still get sued and it may still be in your best interest to settle (not saying that's the case with FB, but just speaking generally).
And I completely agree that if you need something custom or need advice, you should definitely talk with an experienced startup attorney. We refer customers to attorneys all the time!
Just to be clear though - it's definitely not an either-or proposition. A lot of our customers will go to their attorney, explain their situation, and ask "so, are the standard forms YC uses ok for us?" And because these documents are very standard (plain vanilla, as we lawyers like to say), startup attorneys are often either already familiar with them (especially so if they already represent YC companies) or it takes them very little time to review. Best of both worlds :)
And I completely agree that if you need something custom or need advice, you should definitely talk with an experienced startup attorney. We refer customers to attorneys all the time!
Just to be clear though - it's definitely not an either-or proposition. A lot of our customers will go to their attorney, explain their situation, and ask "so, are the standard forms YC uses ok for us?" And because these documents are very standard (plain vanilla, as we lawyers like to say), startup attorneys are often either already familiar with them (especially so if they already represent YC companies) or it takes them very little time to review. Best of both worlds :)