As much as I have fun every time I see a ganker get rekt, specially by a less experienced player (a recent new player who was youtub'n their experience took down a Krait Mk II plasma ganker even while riding a middling engineered Vette, beautifull stuff), I don't mind them gankers. The only problem gankers pose is when they specifically target new players, as if taking out that Defenseless pilot is something of note, and not simply being nocive to people who don't know left to right. People who think that's an achievement have so low standards that I can only pity them. And new players have an extended insurance, that for them losing ships costs even less, so the weak ganker has even less of an impact on the galaxy. There are worse things that badly intentioned players can do to others, like
trapping new players into concentration camps and forcing them to choose between loosing nearly everything they have by forcing a self-destruct or mining for little gain, or
harassing a terminal cancer patient (included on that other story).
Tapping the sign that everyone else is already tapping:
The costs of losing a ship (ganker or not) come from either inexperience, as in walking around with unpaid bonds/exploration data (ALWAYS CASH IN THOSE ASAP) or flying around without credits for a rebuy (biggest no-no that nearly every new player will learn the hard way about), or come from normal gameplay (losing cargo/missions). To ganker or to NPC, these costs & risks are normal part of gameplay loop, and any experienced player will minimize these costs & risks, that again being part of the gameplay (the galaxy is dangerous, be ready). The ganker is just someone who is way more dangerous, smarter and unpredictable than NPCs (most of the time, at least).
The main objective of Elite Dangerous is for us to "blaze our own trail", and being a nuisance to the galaxy can be included on that (while not breaching the Terms of Service, mind you), same as hunting these nuisances can also be. Also keep in mind that a ganker may be someone defending a system from possible attackers, shooting first and asking questions later, either for BGS or for PP. These interactions are all fair in the game's design, and aside from the first two examples above of actual bad faith from players, only the obvious hackers are problematic. The easier ones will do stuff like one-shot-kill weapons, or have shields that are completely immune to damage, making it easier to file reports. The others will fumble the numbers just enough to have an extra edge, and picking these out is nearly impossible (for us, for FDev it depends on their in-place systems to verify player-to-player interactions). I wouldn't mind finding more gankers if this meant not finding people being openly racist/transphobic and other kinds of harassment that do breach ToS.