@RustyBertrand
Yes but...

If a reader asks for an email copy of one of your paywalled articles, by all means send one. But at the same time, deposit a copy in an #OpenAccess #repository (#GreenOA). That will help all who need access, not just the tiny subset willing to hunt you down, write, and ask.

Not all authors have the rights to do this. But many authors have them without realizing it, and in principle all authors could have them going forward.
http://bit.ly/how-oa