Suggestion: Spoilers showing up on mouse-over

[Tasteslikeburning]

Just in case it hasn't been mentioned before, is there any way to make spoilers not show up on mouse-over?

A new thread by Ratel (deliberately not linked to) made me think of this because it gives away a major spoiler for The Wire.

BTW, this is not intended as a bitch towards Ratel, just simply a suggestion of a way we might be able to avoid major disappointment to viewers of what is arguably the greatest TV series to ever grace our screens.