Exemple of how the PVP is ridiculous :>
There is no retaliation limit that we know of.
Since everyone starts at 0, the amount of points lost is probably about 80% of those gained by the winner. It is sort of a chess system where points are roughly something like
15 - 200 points below
20 - 100 points below
25 - same rank
30 - 100 points above
35 - 200 points above.