Great! You have to laugh at a representative of a religion probably reinvented in the 19th century, getting upset over such a thing being done to a 17th century monument on the grounds of ancient meaning.
As long as it doesn't damage the site itself, I'm fine with it!
I'm just amazed the giant survived the Victorians without gaining a giant pair of pants.
Now, the white horse at Uffington, that's a proper chalk figure, my favourite.
As a nipper I used to cycle to the top of the Westbury White Horse and then clamber down dangerously and sit in its eye watching the hang gliderers jumping off the hill. It's probably just as well I didn't live near that Cerne Abbas chap.