So my team is launching a website soon that is a extreme category killer. Is it worth blocking spiders from indexing the landing page right now? What effects will this have on my long term SEO results. Is this question even relevant?
Edit: Title changed to reflect real nature of the question.
Edit2: Great answers below, but in reality I am looking for an answer that directs me to whether the practice of blocking robots pre launch is good or bad for future SEO results.