An MDG might spend all day gluing corporate laptops back together, then spend all night on DIY home laptop projects, or inventing wireless data connections that use radio frequencies normally reserved for space aliens, volunteering for open-source development projects online or spending more hours than they actually have available playing MMORPGs while seated in the same position they spend hours in at work so that, to observers who can't see all the fragging on their monitors, they appear to work at work, then go home and continue to work.
Hardly still a geek at all
geekhood isn't a permanent condition, despite my suggestions to the contrary.
A lot of people embrace it when it's practical, then leave it behind later in life. Senior IT execs, especially CIOs are often former geeks. It's not possible for a high-level executive to have nearly the technical chops as when they did hands-on work, but the distance they put between themselves and quickly-changing well of deep technical knowledge they once would have had to master to get where they are tells you a lot about them.
A senior IT exec who talks constantly about business focus and priorities and team management and budgets and cost metrics and systems refreshes and overhauls has forgotten 90 percent of what he or she ever knew about how the guts of their own departments work.
Those who shed geekery to get on with their lives may have begun as sysadmins or data-center managers who were clearly too talented, extroverted or morally corrupt (depending on how far down the ladder you are from him/her) to use those technical skills only within IT. They found success evangelizing the potential of technology to non-geeks, in the process, ironically losing the mantle of geekhood they put on earlier in their careers.
Outside of work they seem like normal executives; they sail yachts rather than disassembling them in mid-ocean to change something about how the keel sits; they invest money rather than spend it on expensive components for DIY systems that excel in the IY departments, but never actually Do anything. They waste just as much money on new gadgets and electronic toys as any other geek, but they use budget money rather than their own, which goes into paying for shoes and suits that look good but whose ROI no geek can truly understand.
Only claim to be a geek
Geekery became cool sometime between the invention of the World Wide Web and the giant economic crash caused by the failure of all the incredibly well-funded businesses who discovered giving things away on the World Wide Web isn't any better a business plan than giving them away on Fifth Avenue.