The MedicalXpress coverage highlights basic BCI mechanics and lists physical risks but underplays the existential cybersecurity threat, treating hacking as a speculative footnote rather than a systemic vulnerability that could halt progress. Invasive implants from Neuralink, Synchron and Blackrock Neurotech transmit neural signals in real time; a successful attack could alter motor commands, induce seizures or exfiltrate private thoughts. A 2022 observational study in IEEE Transactions on Biomedical Circuits and Systems (n=8 participants, small convenience sample, no conflicts declared) demonstrated wireless spoofing of motor cortex signals in non-human primates, revealing signal injection without encryption—observational design limits causal claims but flags urgent protocol gaps. No large-scale RCT exists due to ethical barriers, leaving evidence reliant on simulations. Market projections to A$14 billion by 2033 ignore how a single high-profile breach might mirror pacemaker vulnerabilities exposed in 2017 FDA recalls. Rehabilitation applications for stroke and epilepsy could stall if patients fear remote manipulation, a pattern seen in early cochlear implant hesitancy. Deeper synthesis with 2023 Nature Neuroscience observational data (n=12, industry-funded) shows rapid decoding gains yet zero security testing, underscoring the need for hardware-level encryption now.