10. What is Mercitio's opinion of dreams and dreamers?

Mercutio believes dreams to be an imaginary foolishness that permeates the minds of those who've nothing to do.... he sees them as a product of idleness.

True, I talk of dreams, Which are the children of an idle brain, Begot of nothing but vain fantasy, Which is as thin of substance as the air And more inconstant than the wind, who woos Even now the frozen bosom of the north, And, being angered, puffs away from thence, Turning his face to the dew-dropping south.