I like the sign because it reminds me of the sacrifice of Christ on the cross. Before you object, I do know that Christ was probably actually pierced through His wrists. However, the symbolism of the above sign still stands. It is nice to be walking through a hospital and be reminded of the atonement.
Additionally, I love the fact that this sign goes along with a cleansing agent. This is an additional reminder that Jesus' sacrifice cleansed me of my sin. No amount of self-applied sanitizer will wash away sin; the blood of Christ shed at Calvary is the only effective sanitizer for my soul.
I'll admit that I don't particularly like hospitals. However, at least these signs give me a reminder of who I am and whose I am.