2008 September 9, Bryan Derksen, “Re: Ten Things That Annoy Me in Science Fiction”, in rec.arts.sf.written, Usenet:
This was nicely lampshaded in an episode of Stargate wherein several characters wind up returning to Earth via the previously-unknown Antarctic Stargate and get stranded there without any idea of what really happened. They conclude that they're on an "ice world" that's devoid of life.
2009 September 28, Fallen [username], “Re: AOQ Dollhouse Review 2-1: "Vows"”, in alt.tv.buffy-v-slayer, alt.tv.dollhouse, rec.arts.sf.tv, Usenet:
The most annoying niggle for me was yet another bit of Whedon lampshading where Whiskey points out Boyd had no interest in her prior to it being made public she was a Doll.
2009 December 14, Joseph Nebus, “Gasoline Alley's relaxed attitude (14 December)”, in rec.arts.comics.strips, Usenet:
Also I noticed yesterday they tried lampshading the advanced age of Walt Wallet, made the curious assertion that a person lives forever in whatever century he was born in, and appears to be going with the ``let's just move on'' approach.
2010 November 27, Sea Wasp (Ryk E. Spoor), “Re: Multi-power writing and rules (was Re: Music magic)”, in rec.arts.sf.written, Usenet:
Yes, but the explanation indicates it's more a matter of Bombadil simply not having the stuff there to work on; he's sort of a different order of being within that world. (He doesn't really fit in LotR at all, but at least that is lampshaded pretty clearly in that and related scenes).
2010 December 8, Wayne Throop, “Re: Giant monsters why haven't the US done well on this compared to Japan?”, in rec.arts.sf.written, Usenet:
Firebreather, approx quote, protagonist's mother tries to explain how his father can be a 100-foot tall monster (an interesting case of lampshading…)