Gee I hope being naked in front of a Buddha statue isn't bad because my five Buddha statues watch me get dressed every day!!!
Anyway. The Buddha image isn't really the Buddha, don't be too attached to the image.
Obviously be respectful.
As mentioned before, in certain countries you shouldn't point your feet at the Buddha or take photos with it.
And again, Buddha never wanted statues erected of him, or to be worshiped really. The point of a Buddha statue, at least the way I was taught, is to remind us to be mindful, compassionate, and of the Buddha's teachings. Also, I was taught that bowing at statues of the Buddha is representation of bowing at one's own potential to be a Buddha, one's own compassion and wisdom, and one's potential attainments.
Bottom line is, in public just follow the local customs as to what's respectful.