depressing stuff! a misinterpretation of empathy is dangeous; there are countless faultlessly unfortunate people that deserve empathy and opportunity, yet there are just as many individuals undeserving of the excuse.
Set proper boundaries and draw a line. If you can't help them, they are still humans on the same planet and live their first and only life.
Empathy shouldn't stop even if 'the worst kind of human' is getting electrocuted.