Agreed. Subtle in-jokes like that would be nice to see more of in the game. The best thing is that they're just that,
subtle. So it doesn't have to break the atmosphere of the game for the "general audience". As another suggestion, IIRC someone mentioned adding an ukulele angled at the side of a desk in an office room, another little reference which would be nice to see.
Also, if I may say, I don't think there's an SCP that really embodies the "seemingly harmless but will fucking annihilate you" type in-game. Sure, there's 1025, but I don't think it really embraces it and only
sometimes kills you. As a proposal, I present to you:
Nibbles. Maybe he could be in a room where his cage could be found, and as you enter the lights suddenly become brighter, by 079 perhaps (at least to make him appear more imposing, he's not doing a very good job ATM and
maybe add digitized laughter). Then maybe 1616 could randomly eat something on you if stay in there for a while, like say a leg, or an eyeball like in the test log (just without the "seeing it all happen", as it would difficult implement), or your arm, varying on different encounter each time you start up the game.