I'd say that it's always better to err on the side of caution. Not everybody has/had GSN, so it's entirely possible that they missed seeing the most recent pass some of these shows received. And vague specifics are still spoilery -- if a contestant's name warrants mentioning, then 95% of the time, it's because they were successful.
I've been watching Blockbusters and Press Your Luck whenever they're new to Buzzr. I don't remember which Blockbusters champions went on huge winning streaks, and I don't remember which PYL episodes had memorable endings, so I'd be disappointed if somebody came on here and said something like "soon they'll air the episode where all three contestants tie at $0." Even if that person didn't say which episode it was, halfway through the episode, I'd be able to see it coming, an that would take away all of the fun of seeing it play out.