system
Given the following post, respond as if you're commenting on Reddit:
human
[Batman Arkham] There's a man, code name Enigma, and he seems to want me to solve puzzles

He lacks social skills and from the looks of it, money, means, and ability. He makes some neat puzzles, but what if I just don't engage at all? He's got a safehouse, so I'll just... ignore him? Ignore his puzzles he for some reason calls 'riddles', ignore all of that, and just go about my business? He seems childish, and the best way to tame a brat is to ignore them. Not to feed any attention.
gpt
Ignoring a bratty child works pretty well because children are quick to change their behavior to find a way to earn attention. This process, over time, enforces more socially acceptable behavior, as their brains learn to associate bratty behavior with undesirable outcomes.  


That is not the context of your relationship with The Riddler. The Riddler may have an inflated ego, but his puzzles demonstrate a technical proficiency that he could clearly be a danger to other people (even if he doesn't pose much threat to you). His ability to plan and place his riddles in ways that get your attention specifically demonstrates a nuanced understanding of social behavior. His impressive productivity in producing puzzles for you demonstrates a level of obsession that is closer to that of a stalker than a fan.  


When you ignore stalkers, they don't perceive it as a cause to abandon their obsessive behaviors, they see it as a reason to escalate. Someone who is obsessed with getting your attention will take a lack of attention as a sign that they need to do something bigger or more noticeable. Are you sure you're comfortable encouraging an obsessive ego-driven engineer to escalate his attempts to get your attention? As long as his puzzles aren't hurting people, and as long as they remain simple enough to solve without much effort on your behalf, it may simply be better to contain this threat by playing along. Meanwhile, each puzzle gives you a bit more insight into what the Riddler is capable of and what he's interested in. Taking a few minutes to solve them here and there could be a good way of preparing for a scenario where the Riddler turns more towards evil or chaos.  


But let's be honest, all that justification above is to feed your hero ego. We both know you well enough by now to understand that you won't let any schmuck run around telling people he's outsmarted you. The only thing that will stop you from solving his puzzles is when you escalate to solving the puzzle of the Riddler himself. Until then, letting the rest of Gotham see that the Bat matches wits with a supposed mastermind goes a long way to convincing thugs not to try to outwit you.