I am no Brit and I use the word trifling quite often
Well, I use that phrase too (I live in the South), but I would still suspect that this was an article posted by somebody with strong Brit connections. This does not make it untruthful or suspect in any way. It simply means that whoever he was, he couldn't have gotten it published in the mainstream press, either in the US or GB. A sad commentary.
I agree. He probably settled on "trifling" after deleting something pithier and more descriptive.
Oh come on. I think you're trifling with us.
;-)