Some say the difference between medicine and poison is the dose. What happens when neural devices go awry or are hijacked? Do people then commit crimes? Compulsively overeat? Perform at subpar levels? Forget their former lives?
Who ultimately has control? Can this technology be sold to governments to control their citizens? Sold to corporations to control their employees or force consumers to buy their products? Sold to abusive ex to make you compliant to their every whim? Or perhaps sold to your romantic or career rival to watch you fail?