So you frequent a bicycle forum, and are surprised when there's a mention of possibly the most high profile bicycle event?
It happens in all sports though. Remember when they announce the football results on the news, the newsreader will say "The results are coming up, if you don't want to know the score, look away now" A few seconds pause then the results are on the screen, no audio. Some people like to relax in the evening knowing they'll get the best bits edited down to a manageable hour or so and still get the thrill of seeing who won.
Every time there's any major sporting event on, someone on the forum will ruin it for someone else with a daft title of
"Button WINS, Webber second, wow what a race!" or
"Aussies go 3 wickets clear" or
"Murray out in 5 sets"
Whatever it may be, someone somewhere will have wanted to watch it without knowing the result. It doesn't take much to put
Grand Prix, SPOILER or
Stage 7 TdF, SPOILER
thus allowing people to read the rest of the forum without having their evenings entertainment spoilt by a thoughtless post.