Hey you know what they could do? As it would be *KNOWN* (sorry couldn't resist ), to the devs who or what a potential spoiler woudl be e.g. 'Revan', they could simply use the word filter to filter it out.
So say if Sion or whoever was pertinent to subsequent major plot devices/twists, whenever someone types something like:
'OMG. OMG....Sion is really your father!!';
It will look like:
'OMG, OMG...**** is really your father!!'
Cool, no? B)
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that might actually work.i am sure some spoilers would get through,though.
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I like that idea, of course some spoilers would eventually come through, but atleast it would minimize them as much as possible.