by Colonel Sun » Sat Feb 05, 2011 4:00 pm
Adding a so-called captcha would probably go a long way to preventing the problem.
Rather than the usual fuzzed out pair of words, one of the most effective I've seen is at ZH,
which simple asks you to solve a simple arithmetic expression such as
57 + ( - 23 ) = ?
with the pair of number generated (pseudo)randomly between 0 and 100.
Never criticize anyone until you've walked several kilometres in their shoes.
Because
1. You're now several kilometres away; and
2. You've got their shoes.