I think strictly from a legal perspective, at least in most countries, they would "require" you to pay taxes on your earnings. However, in many cases they would have a difficult time knowing you have an account without some in depth analysis. I would presume it's quite easy to get away with not paying.

Think about the ways in which your account is tied to the outside world and then think realistically as to how much effort the government is likely to put into investigating you. If you're making $20k deposits from Coinbase frequently and that's not explained in your tax documents when you file, you're likely to be audited. They'll see Coinbase and then they may be able to get information from Coinbase to see your traffic there. In that case they'll see the funds that you transferred from Binance or another exchange. At some point, they may not get more cooperation, but there is a path in blockchain that leads from your deposits to your steemit account if regulators can get their way. Even if they cant link you all the way back to steemit, they can still get you for the deposited funds. However, if you rarely make those deposits and they're small amounts it's much less likely to be looked at.

Another more difficult way to analyze would be to check any social media or email accounts or websites they know about to see if there's any link to a steemit account there. This method is more subjective to each governments regulations. It would also require types of analysis that government's aren't known for being competent enough to perform without third party assistance.

Outside of the realm of regulation is the question of morality. Do governments have a valid claim to your crypto earnings as taxes. Well, an argument could be made that they don't! That argument could also be made in some capacity for your regular fiat earnings, but those are so transparent and regulated that you can't get away with paying them. If you can get away with not paying crypto taxes and you believe morally you shouldn't pay, it becomes a simple risk reward analysis for you to make. That's what it all boils down to for me. Whats the chance they know I have the funds and when I weigh out my moral compass is it more important to fulfill my legal obligations to my government or to keep the product of my labor that has nothing to do with government and use the funds as I deem most appropriate (or perhaps the motivation is to avoid paying because the government funds what you feel are immoral things).