I have not seen a hare shot at in 20 years, nor as already said is there any point at all in a close season for hares.I suggest you direct your comment to the posters who were angry and saddened by a buzzard taking a leveret. The reason given for the anger and the sadness was that hare numbers are falling.
As for the numbers it's reckoned that 100 years ago there were about 4 million and now there are about 700,000.
The BASC put that fall down to loss of habitat and predation. Somewhere between 300,000 and 400,000 are shot each year. The BASC don't mention that as being a contributory factor in the decline in numbers.
I'm intrigued at your claim that mixymitosis wiped out the majority of the hare population in 1961. Are you sure that's what you mean to say?