I hate to say that word, but
true gamers know their specs. Some build whole rigs just for gaming. Now, if a console fanbaby once in a while stops trollin' on forums and picks up a PC game, and something goes wrong, well, it's their own fault xD
Honestly, did you ever just go and pick up a game, knowing nothing about its requirements, and potential issues? There is
always tons of references, even for new games, on the internet; a bit of research into the game's features/performance/requirements/bugs etc. can do no harm. Besides, if they're not sure about whether their PCs can support the game, they can always ask, don't you think?