go to games, click on tf2 and check their stats, playtime (the time they actually played using classes not idling in menu) usually makes up only 20-30% of that unless they're genuinely an old player; I reset mine a while ago because I used to grind strange items on strange servers and it had messed up my stats, so I couldnt tell you what my total playtime is, but I'd guess its around 1.8-2k because I used to do the retarded thing and leave my PC on 24/7, idling on menu then coming back to play when I woke up, no brainer advice; dont do that. You'll find it way easier to sleep when you dont hear fans in the background of your room even if they are very silent.
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