At night they can be scary, but they are right down my

I’m both a mess to be in, and a tangy snack to be eaten.

A certain piggy went to one, though that is all we know. Some places still carry the name, but more often it is a farmer's thing. All in all, I am a way to convene and trade with ease.

An idiom says, I'm hard to see, When one's too focused, On parts of me

Settling any surface, A finger wiped will show me, I make you sneeze, and cough, and wheeze... If y'all don't like me, blow me!