we should not be throwing the word "random" around so loosely. this is pseudo randomness. The fact that it is only pseudo random should be mentiond in the writing.
Why should it? It’s clearly an article about doing neat things with CSS, not the technicalities of different degrees of randomness. Perhaps we should not be throwing around the word “should” so loosely…
The word "randomness" in the title is in quotation marks, which seems like a pretty clear indication that it's not referring to true randomness but to something random-like.