To you and everyone using things != .+@example.com: why? Example.(com|net|org) were specifically created for this purpose and for the purpose of tutorials. I work in client-facing support, and it's very easy to troubleshoot software that /other people/ write when the client says something along the lines of "It says 'connection to example.com:25 failed'" -- I instantly know what the problem is. If you're using things other than example.(com|net|org) for this, you're possibly making the job of a support tech you'll never meet harder.
If your excuse is "I didn't know about example.com!"...well, that's a lame non-excuse. Do the rest of the IT world a favor and fix your tutorials and software -- mail server administrators like me already have enough headaches from the gazillions of spam techniques in use today.
Ignorance is a legitimate excuse. I'm getting sick of people spreading this moronic misunderstanding that ignorance is not an excuse. Just recently the police in NYC failed to follow a judge's order out of ignorance. I wonder what excuse they used.
As for why people don't use example.com, if you're signing up for a site that annoyingly makes you put in a password it will check for non-real email addresses so example.com is out.
If your excuse is "I didn't know about example.com!"...well, that's a lame non-excuse. Do the rest of the IT world a favor and fix your tutorials and software -- mail server administrators like me already have enough headaches from the gazillions of spam techniques in use today.