One thing I do ... or try to do ... when I am starting a post about a certain comic (IE: SECRET AVENGERS) is put the issue number at the start of my comment. Then I don't care if I spoil it for you or not. If you see -
SECRET AVENGERS #6
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Wow, so hows about Reed Richards turning into the new Nova?
- and you get spoiled by that ... that's your own fault. I try and avoid you get a spoiler from me ... sometimes. But hell, if you are reading a thread about Secret Avengers in general, and you are not up to date on the happenings, I think it is still on you if you get spoiled. If you don't want to risk it, avoid the subject.
However, I try to never spoil anything newer than 2 years or so and I just really hate it when I get spoiled because some jack-hole didn't care enough to just think it through and spoils in a thread (topic) that is totally unrelated to what the thread was about. In other words, if I am reading a post on Secret Avengers and I read -
"Yeah, that was cool when Valkyrie slept with Doom. Didn't see that one coming. But then again I didn't see Nightwing sleeping with Wonder Woman in last months Action Comics coming either"
Bottom line, if you start a topic, I believe all is fair game in that thread, as long as it relates to the topic in that thread.