It's a tricky subject. If you make a spoiler page, it better be heavily restricted and unavailable to the average websurfer. People shouldn't find it via a search engine, and even if you require them to sign onto something, they shouldn't be able to create any account and immediately gain access. If you manually allow who gets to see what, I won't be able to do anything about it - I can only presume that you're helping out close friends. If however it takes a few seconds to 'hit the jackpot' on a website, I'll ask you to take the content down or hide it better.
The ideal situation would of course be that you have zero spoilers on your website - that way we would be much more ready to endorse it and perhaps even link it from our main page. If you're bringing spoilers into the picture, even if they are hidden, you probably won't be able to get that privilege.