if you search the archives of the national catholic register (NOT reporter) on their website under crop walk you will get several hits on remarks of various bishops who have investigated the organization (I forget the name, PP is probably right) and asked their parishes and youth groups not to participate. supposedly some of the money raised goes to fund projects here and overseas which not only directly provide food, job training etc. and other assistance to women and families, but allegedly some projects which provide medical care also provide ABC including abortion or referrals for those services. That seems to be the objection, in any case my pastor followed up on this so after several years participation in crop walk, we no longer participate, Instead the teens help with the various other local and parish hunger projects.