7 deadly text-related sins in presentations
blog.niftio.com
blog.niftio.com
If that doesn't quality as deadly sin, what would qualify? How much worse could it be?
[1] So they need to reach out for different sources like archive.org and/or Google cache for the rescue.
"5. YOU SHOULD NOT MAKE YOUR AUDIENCE FEEL WRATH WITH UNREADABILITY"
By all means, point to details on your diagrams; just resist the temptation to point to your bulleted text lists.
They should at the very least have a spot for expanded speaker notes on those sites.