People don't usually get seriously upset about a "big tank" for ball pythons. More often than not, it's a new person who gets offended when it is suggested that their snake might thrive better in a smaller environment after they've come asking for help about why their snake won't eat or whatever.
A large tank can be a bit risky for baby ball pythons because they can cause certain kinds of stress related issues, such as not eating. Pointing this established fact out to someone as something they should consider when housing their baby ball python should not be offensive.
Large tanks can also be difficult to maintain proper environmental levels in. That doesn't mean it can't be done...lots of people do it successfully. But when a new person just getting started is trying to figure out the best way to house their new snake, it's reasonable to suggest that they start with a set-up that is easier to maintain.
All of the above should never be anything more than a suggestion for consideration. Different people have different situations and abilities and work ethics. If you can keep a giant tank clean and properly heated with decent levels of humidity, then I think that's awesome. If your snake seems to enjoy it and thrives in it, then that's even more awesome. More power to ya. It shouldn't be something you feel you have to be so defensive about.
(Oh...and I'll move this out of the "Intro" forum and into the BP husbandry forum for ya.)
