Let's get this out of the way first: "interfere with the experience of other users of the game or any online feature" would be referring to "hacks". Playing a game, the way a game is designed, without exploiting or hacking, is not interfering. If we use your definition, if a CMDR does not submit to my interdiction and let me destroy them, they would be effectively "interfering" with (my) experience or the "online feature" of PvP.
There is no "justification" requirements to engage in PvP in open. Maybe on a morality level, but morals are subjective. Now, if ED had a game mechanic that dictated ROE's, sure. Then we would have to check all these arbitrary boxes before we are granted "permission to fire". This does not exist at this time. But if it did, then you may have a case, but it doesn't so you don't.
A CMDR could state "I RP a psychopath. I will fire on any ship in front of me regardless of affiliation." Cool. Nobody at FD wants to stop that possibility. A CMDR could state "I hate the color green. Any ship I see painted green is a target." Cool. Nobody at FD wants to stop that possibility.
I used to PvP, and I had my own principles, morals, and ROE's. I can tell you, there were a lot of CMDR's that disagreed with my "style". What typically happened is that they would actively avoid me by staying out of systems I was known to be in, playing in solo, or forming wings. They solved their problem with a viable solution, that again, could be argued to "interfere" with my experience as an avid PP PvP CMDR. (that last bit sounds silly doesn't it? It is supposed to)
Again, I encourage everyone who feels like their being "unfairly" targeted to employ tactics to avoid the issue all together. There are a myriad of responses to combat engagements. Need advice? Ask. Mindlessly spewing about TOS interpretations, or getting worked up about the event/game does absolutely zero to solve your issue. It has been years, FD nor Microsoft care that you are being sent to a rebuy in the open mode of this game as that is absolutely part of the game.
*on a side note, crime and punishment is gettig updated this season and I am hopeful that FD and the community find a compromise to both parties involved in these disputes.