My mate has always said if anyone broke into his house and entered intending to steal or cause harm to himself or his partner that he'd have absolutely no qualms about removing one of his shotguns or rifles from the cabinet and using it, as long as the person was advancing towards him that is - anything else and he wouldn't get away with it.
He does stay in a big victorian country house with a long access road and in a very isolated position, fully alarmed house with window bars on the lower basement section of the house so if anyone managed to get through all that i guess they are determined to break in and fully deserve what's coming, which would be 3 pointers and 2 daft spaniels creating merry hell. Knowing him i guess he wouldn't shoot to maim either, brought up in Ireland in the 1970's and early 80's before he moved out of the trouble to London in his early 20's to make his fortune so to speak, from what scant info i've been told regarding growing up in Ireland round about that time it was brutal and seemingly random inhuman violence with indiscriminate kneecappings for petty misdemeanours, vicious beatings from so called terrorist organisations along with similar from the police/army and bodies dumped at the side of the road as a warning were commonplace so hell mend anyone who tries to take what's his nowadays. He was taken aside a few times for daring to go out with a Catholic girl and beaten rather badly, and had to watch as the provo's kneecapped his mate for working with a Catholic building firm, the violence was too much so that's why the pair of them left Ireland to go to London and are still together today.
It's hard to imagine that was only 30 odd years ago, despite what they say it still goes on to a similar but not as explicit extent nowadays, kneecappings and beatings along with extortion are still commonplace but we never hear about it.
For what's it's worth a few years ago i/we caught someone in my house trying to get out my bedroom window, we heard a commotion in the bedroom after coming home late from the pub one night and i ran through to see this little scrote trying to climb out through my window... I'm not saying what happened to him but he fully deserved what he got and i'd have absolutely no second thoughts about doing similar today if i found someone in my home or attempting to break in.