Abusing a glitch to gain BTC (money) could be considered stealing if found guilty (if traced back to you, and you didn't return it).
Bitcoin is not a game, afaik.
I 100% agree with you, but the "stop trying to abuse glitches" cannot be thrown alone in the wild like you did, in my opinion.
It deserves a whole book of explanations on the limits of what's allowed and what's not.
Basically, it breaks down to "if you exploit and steal from other people while doing so, then you should not".
But if the stealing is "just" getting there first and bragging about it, is that still stealing?
Not that simple, even though I'm pretty sure we'd come to an agreement easily on the matter.