In a home 100% free from unsupervised children, I think it is a good idea. I have a mentor (former Air Force LtCol who served in Air America during Vietnam) who has several handguns hidden like that throughout his 5,000 square foot home in Pensacola, FL. He told me he wants to have access to a hand gun in every room, just in case.

"All that the South has ever desired was that the Union, as established by our forefathers, should be preserved, and that the government, as originally organized, should be administered in purity and truth." – Robert E. Lee