Spitefulness is a deliberate act - within which the being act in deliberate spite towards another within the deliberate intention to harm / break-down / inferiorize - the being within this act of spitefulness believing that they're harming / breaking-down / inferiorizing another - when their world will turn 180-degrees upon themselves as their world will show the spite they are.
Spitefulness is a form of mental-rape - within which the being acting in spite deliberately want another to break-down/react emotionally - so that the one acting in/as spite can through harming another in such a way - gain their experience of power, control and superiority.
The other on the 'receiving-end' of the one acting in/as spite towards them, is self-responsible to not give their power away to the one acting in/as spite - because, in essence - if they accept/allow themselves to react = they're only spiting themselves within the very acceptance and allowance of reacting.
Understand that; you become that which you react to/towards - thus, the being reacting to another's spitefulness towards them = become the spite they accept and allow themselves to react to through blaming the being for causing their experience, which would then from the blame - turn into 'revenge' and would become spiteful to 'get back at them' - when in fact they, themselves allowed their own reaction in the first-place.
All of this is done in full-awareness as a means to attempt to control and 'gain power' one way or another through using spite - the only way to control and gain power within spite is through deliberate harm unto another within the manifested-form of deliberate mental-rape within which the being 'feed-off of' the others 'break-down' and experience a sense of pleasure within it - always.
Spite is also used under the guise of manipulation - wherein the being would, for example, deliberately go into a form of 'self-pity' / 'feeling sorry for self' - playing on another's 'weakness' through having the other becoming what you're mirroring to them as self pity and feeling sorry for self - wherein the other will then pity you and feel sorry for you and 'play the game' of spite = so you'd use spite as manipulation to manipulate your reality to 'get what you want' through abusing others to get it.
The being accepting and allowing themselves to 'play this game' of spite that you project unto them - also becoming spite, through accepting and allowing themselves to be manipulated by you - because they're abusing themselves through self-compromise by supporting you within your design of spite as manipulation.
What'll happen here is that; an event will take place wherein the being that 'played the game of spite under the guise of manipulation' will 'regret' 'helping you' when they realise how they compromised themselves within giving you what you want - because in giving you what you want - something had to be taken from themselves = then they go into 'spite' as 'regret' - directing anger to/towards you - and in the anger using spite to attempt to manipulate you again - to 'regain' their control/power in themselves/their world that they gave away to you through falling prey to your spite-through-manipulation tactics.
Wherein the spite the being become within anger - is invalid as reaction towards you - because they accepted/allowed themselves to 'fall for' dishonesty/deception within another as themselves and didn't take self-responsibility in standing up within what they'll accept and allow and what not. Thus - understand = you'll also become the dishonesty/deception you accept/allow within another which you support within another that you participate in with them.
Thus, you only always spite yourself within/as/through your own acceptances and allowances.