If you are using spellwork to better your life, whether by bringing love, money, goodluck, or what have you, this is not going to result in something bad happening. Using spells to try to influence someone to do something is also not going to result in something bad happening to you or your family.
The only time that someone really needs to be worried about bad karma, backfiring, etc is if they are using spells to intentionally harm someone who does not deserve it and for no good reason-if you just do not like the person, but they have not harmed you or you are jealous of the person and just want to bring them harm in some way.
If you keep your intentions on the up and up, no need to worry about getting some kind of negative payback from using spells.
