I suppose I'm one of those "Bible based Christians" of whom you speak. Personally, if done for the reasons you cite (to remember what Jesus did for us), I think it's wonderful.
I always think of one thing when I hear people talk about Catholics not eating meat on Fridays. When I was in college (30 years ago), I served food in the cafeteria and usually on Friday evenings. I was in a building that had a bar in it and they had happy hour every Friday afternoon/evening. One after another, kids would stumble in, drunk as skunks, ask for meat and then exclaim, "Oh, no! I can't eat meat! It's Friday! I'll take the fish!" Seemed kind of odd.
Other students fornicate on Saturday and go to church on Sunday. It has a lot to do with the age. And college. Ignorance. And sheer stupidity.