whack_statuses.rb

#!/usr/bin/env ruby

# To install:
# sudo gem sources -a http://gems.github.com # (if needed)
# sudo gem install hayesdavis-grackle
# see http://github.com/hayesdavis/grackle for more info

# To run:
# Set USER and PASS for the account you want to clean.
# ./whack_statuses.rb

require 'rubygems'
require 'grackle'

USER = "youruser"
PASS = "yourpass"

client = Grackle::Client.new(:username=>USER,:password=>PASS)

puts "Retrieving tweets..."

page,last_size = 1,0
tweets = []
while (tweets.size > last_size || page == 1)
  last_size = tweets.size
  tweets << (client.statuses.user_timeline.xml? :page => page)
  page += 1
  tweets.flatten!
end

if tweets.size > 0
  puts "Requesting to destroy #{tweets.size} tweets. This will take around #{(tweets.size/60).ceil} minutes or less..." 
else
  puts "No tweets. Nothing to do."
end

tweets.each do |s|
  puts "Destroying tweet ##{s.id} with the content #{s.text}!"
  puts '.'
  client.statuses.destroy! :id => s.id
  puts '..'
  sleep 1
end