One thing I’ve noticed from time to time (and just now, hence this post) is pastebin entries showing up in search results.
Never mind the fact that they usually expire quickly (and then only to remain in the results until the search engine does a recrawl), they shouldn’t be there at all. At least, that’s the easier solution.
The more difficult solution would require everyone who uses them to create addenda to their pastes describing what their results were. People use pastebins to show others their code/logs/etc. and usually in conjunction with a discussion or bug. Seeing a pastebin entry for a term you’re searching for means someone else probably had the same issue and may already have gotten it resolved.
But ultimately the right thing to do is for them to exclude search engines. Seeing the paste of the exact thing you search from, while reassuring that you’re not crazy, does not help.