I'm in a similar position, and I don't really see any problems. Unlike you, I have accounts on these services, I just hardly ever log in and don't actively use

I'm in a similar position, and I don't really see any problems. Unlike you, I have accounts on these services, I just hardly ever log in and don't actively use them. I've had multiple employers tweet about my conference talks and add my twitter handle, I see that someone asked me a question on twitter 1-2 years later when I randomly decide to login. I never post on LinkedIn, and I don't really share much of anything on GitHub, because most of the work I've done in my career either was proprietary and hidden or was very much open-source but likely mediated through other parties. At any rate, I'd say don't worry about it. I don't bother even being concerned with this, as what ultimately matters is your direct professional network and reputation. Giving talks at conferences and getting things done, being involved in interesting work, is more than sufficient to sustain and grow your career. In fact, my experience interacting with a lot of technical folks who have huge social media presences is that they have lost some of their technical skills (or maybe never had them at the level they claim) and have become mostly focused on marketing fluff. I have found that as an engineer, and now as a PM, that concentrating on substance over flash is the right approach. Flash can definitely be a way to get things too, but if there's no substance there, it's not sustainable. Social media is just an accelerator for people who know how to market themselves, but without the underlying substance it ultimately goes nowhere meaningful. You do you, don't worry about what other folks are doing, just keep doing good work and talking about it with people you respect.