I am seeing that this post is a bit of a complaint.
Yes, Wicca (Neo Wicca specifically) has caused issues in a lot of paths (In this case Traditional Witchcraft, or the Nameless Art) but at the same time, Wicca has helped much in the way of Magic. Whilst a lot of the information has been taken and rewritten from the Traditional Witches, the Golden Dawn etc it has opened magic up to being more accepted to the public (Even though it still causes some issues)
The public Mix it up because there is more information avaliable publically for Wicca than Traditional Witchcraft. And you can't really blame them, they don't have to learn the difference, you just tell them briefly the difference when they comment, or just take the fact they know what Wicca is as a bit of a compliment (I do, whilst it is hugely wrong, I don't particularly want to explain the intricate ideas of the Nameless Art to them, explain to them about the Devil etc) there is no point.
Both of them are valid Magical Traditions, one is older than the other, but Wicca and the Nameless Art do fall under the umbrella of Witchcraft. Got to get used to that, eventually yes maybe Trad Withccraft will be blotted out, but then again, we don't need everyone to agree with us or know about us, sometimes its better to just keep it to yourself.