Those are good points jedijman. It also makes me wonder why they didn't change Luke's name to something completely different. I know they probably couldn't legally adopt Luke without Imperial social workers asking questions. But here is a Skywalker on Tatooine. Maybe Skywalker is a common name like Smith?
I was thinking the other day about this. Tatooine is very backwater, with not much going on. Anakin Skywalker the only human to win a podrace would be pretty famous. Famous enough that a speed freak kid like Luke with the same name would at least have passing knowledge of. It would have been one thing if Anakin was a great race pilot but not a lot of people knew about it, but no there were thousands of spectators at the Boonta Eve Classic which he won.
Why didn't Obiwan just raise the baby by himself or at least setup an agreement to train Luke as he grew up?
Good point. It would have made a lot more sense for Obi to raise Luke as his padawan seeing as how young the Jedi take children away to train.