It's fine if it's used properly...however, if being used incorrectly by enforcing anti-monopoly laws on a company that's not a monopoly, then it's bad practice.
You don't build someone else up by knocking someone else down.
For example, if I was playing basketball against Lebron James, tying his feet together and one arm behind his back might make me more competitive against him, however that doesn't mean that it's made me a better basketball player.
Define "monopolistic behavior"...
If by that you mean trying to sell more and do more business than their competitors... that should be the goal of every company (if they have any drive for success).
People who demonize this practice apparently want the kind of competition where nobody wins...
Look at how the situation was handled with the Microsoft case
United States v. Microsoft Corp. - Wikipedia, the free encyclopedia
As I made reference to earlier, the US made efforts to "tie the feet together" (attempting to force them to share their intellectual property with competitors, etc...)
...it didn't work and offered very little in terms of helping other businesses.
It wasn't until Apple starting making products that people wanted to buy again
that Microsoft was actually challenged competitively.
You don't beat a market giant by cheating, you beat them by coming up with a good idea of your own.
Walmart is in no way unstoppable...
You have to keep in mind, Sears was every bit the giant walmart is today back when walmart was nothing more than a single store in a strip mall.
...much like Walmart overtook Sears, it's very possible that someone could overtake walmart.
Minimum wage
isn't about a Fair wage...it's exactly what it's called...a minimum wage... If it was about a Fair wage, then there wouldn't be 200 different occupations that all pay exactly the same, the wage would be different based on the complexity of the job and the rarity of the skill.