Even if you hate a gift, it’s not hard to say, “Thanks for thinking of me.” It is the presumed thought that counts. Even if paranoia leads you to suspect dark, secret motives on the part of the giver, all anyone ever has to do is acknowledge the most basic assumption. Somebody thought enough of you to buy you a present. So thank ’em for their thoughtfulness. Full stop. Nothing else required.
“Veb”, from this discussion.