Haha wat een ongelofelijke baas die Eric Bazilian! Ik moet me diep schamen waarschijnlijk, maar blijf 'm opzetten. 
Firstly, there are more people than just Blutonium Boy that have been using a sampled kick from Zatox. Tracks are coming through thick and fast from everywhere. I'd be really pissed if I was him.
Secondly, a hardstyle kick isn't like any other piece of percussion from any other genre. Its what makes or breaks a track and takes up a huuuuge amount of the work behind the genre. It takes days if not months to create a good solid kick that works and each producer will have their own unique sound and style.
Simply taking someone else's hard work, passing it off as your own is frowned upon.
Hardstyle (and also hardcore) has a very strong DIY culture. You make your own sounds, you put in the hard work and find your own style. Taking someone else's work is cheap, cheating and shows that while others have the motivation to put in hours, days, months creating their own sounds, you don't have respect for their hard work and simply steal to get ahead. Its this DIY culture that has pushed the level of production in hardstyle so high. There are no short-cuts so only the best produced music is supported by the top DJs.
But also I strongly believe that if a producer really loves making music, they will do all their can to learn, hone and perfect their craft without taking cheap short cuts to try and get ahead. Sampling someone else's kick one such short cut. It's simply not kosher.
And for those that are wondering about my sample usage, I do almost everything in my own productions, I create all my own my claps and snares with my own patches, my sfx from synths and granular synthesis, I write most of my lyrics or work with a singer/song writer (and jam in the studio until we come up with something) and I make my own kicks too. When I sample from other tracks, I do it in the traditional sense of hunting down obscure, forgotten, unplayed records, transforming their work into something new and unrelated to the original.
What Blutonium Boy has done is not sampling in the traditional sense - first he denied he used Zatox's kick, then after much backlash he admitted to it and then said creating such a sound is easy and everyone should move along. Worse still he claimed that he had a discussion about this with Headhunterz at EDC Chicago where Headhunterz has then said he knows nothing about this and wants to stay out of it.
If anything, Zatox's response is much more calm than I would have expected and he has every right to be upset.
General rule to keep in mind: sampling a kick to learn from it is acceptable, sampling a kick and putting it in your track and trying to pass it off as your own is unacceptable.
