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Re:You’re not anonymous. I know your name, email, and company. by pyre on Tuesday December 11, 2012 @10:21PM (#4908432)
More like laziness. They probably only allow something like:

  ^[a-z0-9_.]+@(?:[a-z0-9-]+\.)+\.[a-z0-9]+$
Re:You’re not anonymous. I know your name, email, and company. by jfoster on Wednesday December 12, 2012 @03:30AM (#4909212)
In my experience it's been ignorance rather than laziness. I suppose you could argue that the root cause of the ignorance is laziness. If someone is writing a validator, they probably ought to check what constitutes valid input.