My view on it is simple: the dance move/s themselves are inoffensive. People should be entitled to dance however they like. It's neither here nor there.
... However, there is certainly an element of aggressive behaviour that appears to be more prevalent amongst "that crowd." Stereotypical? Yes. But nevertheless true.
Like a lot of things in life it is a small minority ruining it for the rest of us, and a small minority giving their fellow peers a bad name.
The trouble is that this popular deep house sound has been jumped-on by the crowd that used to be into UKG - a scene where a lot of people thought it was acceptable to bring attitude to a rave. The dance troupes and street dancers that used to be on the "urban" bandwagon have now jumped shipped. (arguably, they are part of the reason the urban scene is on its knees - at least in my area - but that's another story entirely).
Interestingly enough a good friend of mine - a fully-fledged "shuffler" as chance would have it - met the guy who set-up that Anti-Foot Shuffling page on FB (and, I believe, he is the same guy who wrote the piece for Mixmag... although don't quote me). Apparently, both the page and the article are tongue-in-cheek and only half serious - the guy is actually a foot shuffler himself. He created the page to be ironic because he thought it was funny how wound-up some purists were getting about shuffling!
Although he does resent the bad-attitude which is giving all shufflers a bad name.
You can pretty much guarentee which parties are gonna be shuffle-free, and which are gonna be shuffler's paradise, so if it offends you that much, just avoid these placees.
In a related note, I see Magna Carta issued a press-release over the weekend saying they were clamping down on the "type of customer" they will be allowing into future events, and even hinted at reverting to a invite-only policy. More than a little nod to the shufflers me thinks.