Thanks for that.
I changed that applications list part and linked in the VOIP section as follows:
The consequence is that UDP-based protocols and applications cannot be used to transmit UDP datagrams between guards and exit nodes in the default environment, for example, some [[VoIP]] or video applications.User Datagram Protocol - Wikipedia
It’s a good Question re: use of UDP apps in general forced through the Tor network. I know little about networking, so wasn’t sure of other relevant applications or protocols that Whonix users would frequently want to use in this manner? I figured you experts would know.
Based on my quick read of the VOIP wiki entry, it looks like really bad advice to be forcing it over Tor anyway, given the voice recognition de-anonymization potential. A big fat warning probably needs to be at the top of that page, just like the wiki has for VPNs and other anonymizing networks in long chains.
It all seems to come back to peer-to-peer, metadata-less, hidden services-based instant messangers like Ricochet as being the gold standard for high-security comms in general.
Or perhaps something like I2P-bote, but I know very little about that, apart from what’s in the wiki. Tox looks promising too, but still too early in development to trust.
Re: reviewing the VoIP page
I’m happy to review the VoIP page next for editing, now that the Security Guide is done.
Although, I’ll probably finish off the rest of the templates, since I’ve already reviewed and edited the first 100 out of 233 (total) templates on the website i.e. Special:UncategorizedTemplates (except for the “Build Documentation” ones, since they look very painful and I’ve been procrastinating on those). 
I also realize that translate tags should get added to every page on the website too right as per @Ego’s instructions? Looks pretty simple to do.
(Edit by Patrick: Ego → @Ego)