Would "stand your ground" and "castle doctrine" be a valid defense if said BH announced himself before entering? If the law gives him the right to enter, and he has given knowledge of his intent/purpose, somebody is gonna spend a lot of money in court defending "stand your ground."
SDA states the bad guy must enter your home illegally for SDA protections to apply. If the BH announces himself loud enough to be heard thru the door one could make a strong argument that an entrance by kicking in the door would be a legal entry - even if the BH did go to the wrong home.
This law sucks. Its gonna get people killed, innocent people. I often wonder how politicians can sleep at night.