If a neighbor puts up a political sign for a candidate you oppose, do you reciprocate with an adversary sign?

Question

Answer 1

Naah... the neighbor that puts up signs is a deranged liberal, and his candidates almost always lose.

Answer 2

It would scarcely foster good relations with the neighbour, would it? 

But no, I haven't yet run across a candidate I would want to give that degree of support.