The idea of a universal acid is of a corrosive force so strong it eats through everything it comes in contact with; it cannot be contained, as any container would be eaten up by the omnipotent acidity within.
The universal acid could not exist in this world, or else all would succumb to its unstoppable power. It does, however, have applications within the realm of thought, as a metaphor for ideas so powerful they dissolve all that has gone before.
Using this metaphor, dissolution is not the same as destruction, as chemically an acid does not destroy, it changes; when zinc comes in contact with hydrochloric acid, you still have zinc, chlorine and hydrogen: only the chlorine and zinc join in an ionic bond and the hydrogen is released as gas.
So it is with universal idea acids abounding on the interwebs:
Collaboration, creative commons, open source, memetics, folksonomy, social media and many more.
These ideas are slowly eating through the structures that have previously contained human interaction and are producing unforeseeable and new configurations of the social atoms also known as people.