Vending machines like that are also a risk for spreading Campylobacter.
Several reported incidents over the years and I know of local incidents down here.
I'd rather drink weak UHT skimmed milk than shit my guts out for a week.
I went to agricultural college in the 70's and worked for a while in the dairy industry. There are definate risks involved with drinking unpasteurised milk.
The primary one is the milk isn't tested for antibiotic content, but also bacterial content as well.
There is nothing wrong with pasteurised milk. It is heated up to 72.5 degrees centigrade for 15 seconds to kill harmful bacteria. The process was invented by Louis Pasteur to prevent the spread of brucellosis which was a common ailment from drinking milk at the time, but it also eliminated other bactreria that could be present.
UHT milk doesn't have any real benefit over normal pasteurised milk, but as it is heated up to a higher temperature, 84 degrees centigrade for 15 seconds, it starts to caramalise the lactose content in the milk which is why it has a slighlty burnt flavour to it.
When milk arrives at the dairy, it isn't just tested for antibiotic and bacterial content, but it also passes through a high speed centrifuge to spin out all the non milk solids that are present. It's cow shit, blood cells, skin cells, hairs, you name it, but take it from me it smells bloody awful when you have to take the centrifuge apart and scrape the plates clean, and there is a lot of it to remove.
Sending milk that hasn't been processed to remove all that crap down my throat isn't going to happen.