Your argument that coated spores are heavier and therefore cannot fly is, of course, absurd.
Coated spores stay as single spores, even if they have a slightly larger mass than uncoated spores. Uncoated spores clump together into heavy clusters of many spores which cannot fly - they also stick to surfaces and cannot re-aerosolize.
This link makes things rather easy to understand:
http://www.lfg.techfak.uni-erlangen.de/Personen/Ehemalige/MLinsenbuehler/Forschung.html
The coated lactose particles, although having a very slightly higher mass than the uncoated lactose particles, have smaller average particle diameters, and thus have far superior aerosol properties.
Lake usually refuses to answer these simple questions:
(1) Out of the two samples at the link above, which lactose sample is heavier (a) Figure 5, pure uncoated lactose particles or (b) Figure 7, lactose particles coated with silica nanoparticles.
and
(2) Out of the two samples at the link above, which lactose sample will most easily aerosolize (a) Figure 5, pure uncoated lactose particles or (b) Figure 7, lactose particles coated with silica nanoparticles.
The answer, of course, is that (b) the coated lactose particles are heavier but will nevertheless have far superior aerosol properties since they will not clump with other lactose particles or stick to other surfaces.
At this point Lake usually has a hissy fit and starts ranting and raving about conspiracy theories - which I’m sure he’s just about to entertain us with now.
FALSE!
The subject is MICROBIOLOGY, NOT CHEMISTRY. Your beliefs are based upon manufactured substances made from polar molecules such as lactose. Polar molecules (like water) will bind together.
DRY spores will not stick together in any significant way. If two DRY spores are placed together, any force -- even the slightest breeze -- could easily separate them. That's why you cannot leave a Petri dish with an anthrax culture open in a lab. The bacteria will sporulate and float away. NATURE DESIGNED SPORES TO DO THAT.
Your belief that van der Waals forces would affect a spore exactly the same way as a particle of lactose of the same size is just plain IGNORANT.