This is a very simple script to slowly corrupt directories. Use at your own peril.

COPYING

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
                    Version 2, December 2004

 Copyright (C) 2004 Sam Hocevar <[email protected]>

 Everyone is permitted to copy and distribute verbatim or modified
 copies of this license document, and changing it is allowed as long
 as the name is changed.

            DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. You just DO WHAT THE FUCK YOU WANT TO.

swr.py

#!/usr/bin/env python
#
# Inspiration for the name of this script: https://youtu.be/nVVTOHVXQQA
#
# (c) 2017 Jasper Spaans <[email protected]>
# This software is licenced under the WTFPL version 2 <see the file COPYING>

import mmap
import os
import random
import sys

x = "All this data is lost in time, like tears in the rain! "
lx = len(x)
y = range(lx)
random.seed(1337)
random.shuffle(y)
target_dirs = sys.argv[1:]
if not target_dirs:
    print "Please supply one or more pathnames on the commandline"
    sys.exit(-1)

counter = os.path.join(os.getenv("HOME"), ".swrcounter")

try:
  with file(counter, "r") as f:
    c = int(f.read())
except:
  c = 0

all_files = []
for target_dir in target_dirs:
  for root, dirs, files in os.walk(target_dir):
    for fn in files:
      real_fn = os.path.join(root,fn)
      st = os.stat(real_fn)
      all_files.append((real_fn, st.st_mtime))

the_char = x[y[c]]

for f in sorted(all_files, key=lambda x: x[1]):
  fn = f[0]
  with file(fn, "r+b") as fi:
    mm = mmap.mmap(fi.fileno(), 0)
    for offset in xrange(y[c], len(mm), lx):
      mm[offset] = the_char

c = (c + 1) % lx
with file(counter, "w") as f:
  f.write(str(c))