Yes, I'm afraid I also fond FGZstar's poster both meaningless and mildly offensive.
[Plural] I still occasionally come across people who insist "data" can only be a plural. Funny that they don't make the same fuss about "agenda".

[INJ/SM] I presume it was intended as the opposite of the magnificent "Keep Calm and Carry On" posters of the Second World War.

(ISP) I think "data" can be both but I agree that to insist that it is always plural is pretentious and a bit annoying, a bit like government propagandums.
(Phil) Don't quite remember 'em, but if you say so. :-)

[Phil] Thanks. I'm not overly conversant with WWII UK memes unfortunately. In fact, Mr. Chad (known elsewhere as Kilroy) is the sum total of my knowledge of the matter. Or was, since I now know something else thanks to you and FGZStar.

I recognised the reference to 'Keep Calm and Carry On' - available on mugs near you - but still don't see what FGZstar means. I'm happy to accept that it's just a generational thing.