XF 2.1 Make discouraged users complete a captcha

[HJW]

I don't have guest posting on my site, but want to make discouraged users complete the captcha. Are these two changes the right way to quickly achieve it without breaking anything?

thread_view

<xf:if is="$xf.visitor.isShownCaptcha()">
to
<xf:if is="$xf.visitor.Option.is_discouraged">


quick_reply_macros

<xf:if is="$xf.visitor.isShownCaptcha()">
to
<xf:if is="$xf.visitor.Option.is_discouraged">