The reporters will have a field day, the poor interns they get to convert this into a digital form and then read over them in their entirety to try to find something interesting are most likely not very excited...

Wonderflonium and Unobtanium.

Why not just fullscreen your browser? I believe F11 is generally the hotkey for most browsers. I do that from time to time to get the most out of my screen. You've still got access to everything, it's just auto-hidden must like the Windows taskbar can be.

I really don't appreciate the thought by Mozilla that I don't understand URL bars or don't know how to use them. It's insulting to think that by now the vast majority of computer users don't understand almost everything about them. It shows where you are; if you type something and hit enter it tries to go there; some URL bars act as search bars as well; it's not that difficult to wrap your mind around. Besides, I would much rather spare those 50 pixels or so for easier access to it.

I'm not fond of Ubiquity so far, either. It's all personal preference, and I'll prefer using a more traditional-looking browser if I can't eventually undo all these design changes Mozilla wants to implement. The moment I have to use a third-party add-on to restore the look and feel I want is the moment I change browsers. I'm only sticking with Firefox now because of Ad-Block and one or two other plugins.

Little Susie was a girl
but now she is no more
for what she thought was dihydrogen monoxide
was dihydrogen sulfuric tetroxide.

I was thinking more along the lines of the function of sending a soda to a random stranger, though. The friend-to-friend one would be glaringly obvious. From TFA:

That kinda sounds like I was thinking out loud to myself. It was supposed to be one of those: "If you're going to do this you should also consider this" type of comments.

AP Isolation is a nice DD-WRT option that prevents wireless clients from communicating with each other. Best to disable wireless GUI access to the router, as well. I've had a DD-WRT router for years and I've never looked through all these settings until now.

Their "Random Acts of Refreshment" is a neat idea and I'd like to take part in it, but not only do I seriously doubt I'll ever see one of these in my town but how would I know Pepsi isn't just keeping the money I give them to get some stranger a free soda?

This'll be easiest if you've got a DDWRT-capable router or a PC acting as a firewall / router. Otherwise you may have severely limited configuration options. QoS can help to control bandwidth issues, as well as a hard limit on the bandwidth. Not sure you can configure any standard consumer-level router to separate the wireless network from your internal network, but it can be done with the right equipment. I'm no expert on the subject, but with certain equipment you could potentially firewall off the WAP from the rest of your LAN.