One of the biggest complaints by the Wiccan community is that True Blood portrayed us as murderous manipulators. It's a fair enough concern.
The most cursory examination of the history of witches will quickly show how dangerous such charges can be. The Burning Times looms quite large there. Hundreds of thousands of suspected witches were tortured and killed. In the modern day, people have lost their jobs, had their children taken into care and suffered other social exclusion due to being 'outed' as witches.
However, did True Blood actually depict us like that? I watched a Wiccan coven do its best to stop an out of control, possessed High Priestess. One of them was killed in the process. At the finale, it was a savvy Wiccan who harnessed the Sabbat, at Samhain, to call for reinforcements. She saved the day.
The real message, as far as I interpret it, is much more subtle. It said that Wicca is so ineffectual, that it doesn't stand a chance against the real thing. That being, in this instance, the kind of magic that got you burned at the stake in 17th century Spain, or is happening right now in Mexico. If anything, it's not anti-Wicca, it's anti-Latino.
It also implied that those targeted by the Spanish Inquisition really were powerful witches, capable of mind manipulation, murder etc. That's an unsettling suggestion for an historian, but even that was qualified. The witch Antonia was a gentle woman, who healed people and delivered babies. What upset her was rape, torture and being fed upon by vampire priests. It was being burned at the stake which really turned her magic bad.
Let's also look really long and hard at the effective magic in True Blood. Give or take Christian Witchcraft circles, where have you ever seen Wiccans crossing themselves? Every strong spell invoked a Christian saint, angel, God or the Holy Spirit. This was not Wicca. It was witchcraft with Christianity at its root.
Was Wicca maligned? No. It was dismissed. It had no power. The message of True Blood season four was this: beware any Christian spell delivered by Spaniards or Mexicans. Now that is truly dangerous.