The thing is when you do it that way, people have to highlight the stuff you spoiler to even know what is under it. It's possible they may know one of your spoiler tagged names but not the other, right? So in the end you draw people into looking at spoilers because you're so bad at it (not just you of course, pretty much everyone in this thread is terrible at it).
I've finished the game so I don't care either way. But yeah, you might as well just not use them.
If you are actually serious about protecting people from spoilers, read the spoiler tagging portion of the member etiquette faq.
http://www.neogaf.com/forum/showthread.php?t=428781