There are some crazy ideas floating around here. First of all, the "I didn't know I was taking steroids" excuse is bullshit and been used countless times. A low-level steroid can exist in lots of things, but it's not necessarily the same kind of anabolic, performance-enhancing steroid. Steroids in cough drops do not show up on drug screens. That's like telling a cop you aren't drunk, you just took some NyQuil. There's also the famous poppy seed bagel joke. If we're going that route, let's believe Roger Clemens and Barry Bonds. Poor them. Him being Mexican is not an excuse, either. It doesn't matter where he is from, or how they do things there. He should fucking know better. He signed a contract, and I will be absolutely shocked if he was not informed of the wellness policy and had to sign off on that either separately, or within his talent contract. He knew the risks, was an idiot and got caught.
To the guy saying that it's different than "competitive" sports and that wrestlers should be encouraged to take steroids... Whatever it is that you happen to be on, put it down, back away and just say no. Please and thank you.
On to a more legitimate point of discussion, the Razor/Diesel comparison is valid, but it's more akin to some of the other stuff we've seen, like when three or four different people wrestled as Doink throughout the character's existence. Because of the face paint, it was harder to tell and a lot of people didn't know. The same logic can be applied to someone wearing a mask, on a purely surface level.
In the case of fake Diesel/Razor, it was really quite apparent that Glenn Jacobs was not Kevin Nash and whoever the other guy was (I forget his name) was not Scott Hall. If an actor and did a stand-in for Heath Ledger in The Dark Knight, a high profile film, replacing him in a scene with his face on camera, speaking dialogue, people would think it was bullshit and throw popcorn at the screen, but if someone did a stand-in when he was wearing a mask, people probably wouldn't question it or know the difference. There is a difference between smoke and mirrors and just blatantly insulting peoples' intelligence.
That said, I'd prefer that Sin Cara just stopped existing, regardless of whoever they want to wear the mask. I'm annoyed by the special treatment, his inability to deliver and the complete lack of direction for the character.