First: The strip includes 3 LOLcats clichés in four panels. If this were anything other than a retroactive attempt to create legitimacy, we might see three strips with one cliché each.

Second: The history of the so-called artists includes rather improbable details. It states that the artist worked as a “part-time walrus hunter” which is probably a reference to I has a Bucket.

And Finally: The poster’s blog has a fascination for material from the 30’s and 40’s and includes a number of the Laugh-Out-Loud Cats strips, many of which contain anachronisms. Examples follow.

One - The resurgence of H.P. Lovecraft’s fiction is a fairly new phenomena, and would have been a lost reference to most.
Two While the word ‘posse’ certainly exited, it was not used in this kind of colloquial manner until recently.
Three This cliché is fairly recent, and derives from the original “I’m in yr base, killin yr doodz” a video game reference.
Four A computer reference.
Five An internet forum or bulletin board reference.

I think I’ve debunked this enough.