OK here is my theory. (Warning: I've been cooped up at home with allergies so I have way too much time to think, lol)
Like everyone else on Facebook I have seen the previously bewildering hoarding of toilet paper.
I think I have a plausible theory.
I think we misunderstand the hoarders. All the pics I've seen of the virus make it look like the size of a gopher. I mean they make it look like an like a 1950's a huge sci fi alien floating along and bent on world domination. I think the hoarders' plan is to throw the toilet rolls at any approaching virus, thereby stunning it and allowing the virus to get tangled in the paper.
This should give the thrower enough time to escape, or, if they are feeling brave, run over and whack it with a gardening implement, to stop it in its tracks.
Now don't I feel silly thinking that the hoarders didn't know what they were doing.