Dica do Braga. Surrupiada do Guardian:

According to a scientific report, planet Earth's computers are wide open to a virus attack from Little Green Men.

The concern is raised in the next issue of the journal Acta Astronautica by Richard Carrigan, a particle physicist at the US Fermi National Accelerator Laboratory in Illinois. He believes scientists searching the heavens for signals from extra-terrestrial civilisations are putting Earth's security at risk, by distributing the jumble of signals they receive to computers all over the world.

...

In his report, entitled Do potential Seti signals need to be decontaminated?, he suggests the Seti scientists may be too blase about finding a signal. "In science fiction, all the aliens are bad, but in the world of science, they are all good and simply want to get in touch." His main concern is that, intentionally or otherwise, an extra-terrestrial signal picked up by the Seti team could cause widespread damage to computers if released on to the internet without being checked.

Segundo o Braga, é a vingança por "Indenpendence Day". Lá em Varginha tem um anti-vírus bom. De chumbo, hehe.