First of all, thank you for your calm, eloquent and reasonable response, so sadly lacking in today's average Internet user.
I'll put my cards on the table and say that I don't consider the Sire Z series to be copies, and I never got the feeling that they're trying to be copies. Heavily influenced? Sure. To my mind though, this bass says "bastard child of Stingray and Lakland 44/5-02" to me rather than slavish Stingray copy. Compared to a Stingray - different headstock, different body shape, an extra fret, what appears to be an amalgam of the EB and Lakland bridge plate. For starters. I see this bass as a melting pot of influences and to my eyes succeeding in coming out with something fresh and different enough to be considered on its own merits. I'm not buying the Z7 because deep down I want a Stingray and I can't afford it. I'm buying one (if it ever bloody arrives) because it's a Sire Z7 - I like how it looks, I like the specs and I think it has its own style. It's the same way I feel about my D5 - yes, it's a '54 P - but there's something... off (in a good way) about it. Maybe it's that pickguard shape, gives me Cowpoke vibes. I dunno. Brains are soft and squidgy like that.
I think the bottom horn of a Ray is goofy looking. There, I said it.
To call this "industrial piracy" is a bit extreme in my estimation. I think it's lazy, route one internet bollox to simply label the Z3/7 as "Stingray copies" and I think they can happily co-exist in the market without treading on each other's toes. They do different things, they're made differently, have different specs, and I don't think they'll cause that much cross contamination of the gear gene pools. Your diehard EBMM/SBMM fan is not going to give a Sire houseroom, so who's poaching sales from anyone? You'd have to be thick as a brick to confuse the two, frankly (and continuing the Tull references )
I absolutely think that EBMM should go after obvious and physically (almost) identical copies, and support them in doing so - that's not right and I don't support it one iota. I just don't think that it applies in this case.
I'm happy to accept the point that things may well have changed at EB Towers in 14 years, but consider that the internet has a long memory and if that's the kind of reference I'm going to find upon a cursory search, then you can bet that's what people are going to go and run with in today's instant gratification world.