I search the web for spoilers when I find a new book or TV series, and if I find a spoiler of something interesting enough then I go read/watch that book/series. If I read/hear about what happened, then I want to see how exactly it was done in the book/series.
When someone spoils something in an ingame chat, I get a little overcome with worry for the others who's eyes the spoiler may have drifted into. To avoid spoiling something, I usually think long and hard before I post something in chat that has material that I know is from something, I try to come to grips with my excitement, so I'm not like "Woah, -character name here- just rode a skateboard! How unusual for that character to do!" after I witness one of my favorite characters riding a skateboard; I find excitement can cloud my forethought quite a bit, but I don't know if it is the case in other incidents where a spoiler is leaked.