I made a riddle.
Should you wish to be unknown,
I'll hide you from their eyes.
Many who use me seek anonymity
And therein my skill lies.Should you wish to portray fiction,
I must be acquired,
But only in the cases where
My presence was there prior.Should you wish to be defended,
from enemies you cannot see,
my use is recommended
though not everyone agrees.Though my purposes are many,
the world knows me for a few.
One was for a new plague
And the other plagued the news.What am I?