Whether you call it avoidance or evasion, I don't think it really matters. If you don't agree with the taxes your state collects, then move to a place with lower taxes or no taxes at all. You are living where you are for a reason. Obviously you like it. I know one thing, if you "avoid" paying your home state the taxes on something you bought in another state, then don't be surprised when you receive a tax bill from your home state. I know on the NC state tax paperwork that we file every year, there is a question where it asks if you bought anything out of state. States are really cracking down on getting what is theirs.
What the OP mentioned is shady in my book.