I am very vindictive. It is a dog eat dog world and I have learned that as honourable as it is turning the other cheek people tend not to learn anything from this and may make you feel like a better person but the bully learns nothing and likely will not change their ways.
Nail them. Make them pay.
Find their weakness and expose it and show them that you are not going to meekly lie down for them to kick you.
Hell we teach our kids to be independent and confident and that good manners requires if you do the wrong thing to acknowledge it, accept it, apologise and seek to make it right. Basic stuff.
Someone tries it on and they deserve to be hit hard and revisit the lessons of their childhood and register that they deserve the arse kicking they just received and probably a good deal more for times that others did not do it.
May make me a "bad" person but I can live with that very easily and I refuse to be a victim or someone's punching bag.