Considering that about 266,000[1] people are injured by burglars per year, deaths included, I'm not seeing how the resident being able to shoot back is making anything "less safe" for anyone except for the burglar, which I'm pretty sure anyone getting burgled is usually ok with.

Though as to why burglaries went down, I wonder if people got more alarm systems or took other deterrent countermeasures after the database was published?

[1] A DOJ special report PDF https://www.bjs.gov/content/pub/pdf/vdhb.pdf