# Turnitin downloaded a 20MB dmg file, and then 
# scraped the entire freakin' site over the next
# hour. You need to throttle back on those giant
# files, and spread the scrapage across multiple
# days.
User-agent: turnitinbot
Disallow: /


# I see this bot crawl me often, with no apparent
# gain for me or its customers
User-agent: NPBot
Disallow: /