Negative effects exist to be used. Surely isn't nice to receive negatives effects, but is your problem if you decide to answer. Take responsibility as an adult or better chose to ignore them.
This isn't Sith's point, the point is more like:
Player A [5]: hehe i hexed this lvl 20 who is raiding
Player B [20]: this lvl 5 speck dared to curse me? *squish*
Player A [5]: *surprised pikachu face* now i will report this lvl 20 for attacking me
Unless Player B is extremely diligent, taking screens, sending to guards after, they're pretty likely to get punished even though the attack is totally legal, because Player A will report to his own guards and say "wah wah mr guard look this lvl 20 attacked me in my own lands! BaN bAn REEEEEEEEEEEEEEEEEEEEEE".
If this is Player A's first time then whatever, maybe they don't know the rules since the attack rules are so convoluted anyway, I wouldn't blame them. If they are doing it over and over again then they're clearly just being malicious and deserve some kind of punishment for trying to circumvent rules and get innocent players jailed.
So yeah, of course I agree this change would be nice, not that anything is ever gonna happen