While this is arguably less a problem with WalMart - issuing a chargeback won't get you banned from their physical stores - a chargeback is especially something be avoided with every vendor where you have an "account" of some sorts, except if you don't care about being banned (permanently).
The examples are numerous. Issuing a chargeback against car rental companies can put you on their DNR (Do Not Rent) list[0]. Issuing a chargeback against Amazon may result in a permanent ban (including loss of access to your Kindle library and even your AWS account)[1]. Issuing a chargeback against Sony for a purchase over PSN may get you banned from PSN[2].
[0] https://www.flyertalk.com/forum/hertz-gold-plus-rewards/1897...
[1] http://bricksetforum.com/discussion/comment/159184/#Comment_...
[2] https://www.reddit.com/r/PS4/comments/2ivsz3/beware_if_you_s...