Introducing EVA OK!
This simple mod adds child locks for your Kerbals! No more accidental EVAs when you wanted to IVA. Prevent deaths, Promote Science!
EVA OK! locks out the ability to EVA during certain situations, but can also be bypassed by hold down the right CTRL key on your keyboard and then clicking the EVA button.
Check out the EVA OK! on the KSP Forums for more info!
Thanks for looking!