no avc denial for httpd_tty_comm checks ???

[Zing]

Is it normal for no avc denial to happen if the httpd_tty_comm disallows
httpd to grab the tty?

I ask, because I just setup a key for apache on core 5 and httpd_tty_comm
will deny apache tty access by default.  That's fine, but the first thing
I checked was "aureport --failed -a"  and it was silent about anything
failing... this doesn't seem intuitively correct, but I'm just a
selinux beginner.

thanks.