A filter should not be made. But saying "ez" or "rekted" towards someone in the way you explained Savvy911, should be classified as harassment and result in a warning if reported. This being because like said previously, "ez" and "rekted" are used for other reasons.
On PvP, the only time anyone will use "ez" or "rekt" in a sentence is when they are trying to know down someone else's ego. And yes I agree with you. I like your suggestion.
Its not a rule yet. This is only a suggestion. The suggestion has to be accepted by Noobcrew or CypriotMerks for it to be put in place.
Most likely it's not going to be accepted due to the amount of players who would be muted for this or banned, it's not harsh unless you take it harsh, players are eZ on KitPVP and they are allowed to say it.