It depends on the person. Sometimes it would spark conversation, other times it would make the person not want to trade with you. For example, when 26 offered me Werth, Eckstein, and Fukodome for Markakis, Utley, and Street, instead of counter offering, I wanted to block his email address and never open a future offer from him. And it seems like Diony is having the same reaction that I am. I don't think that it's a wise technique from 26 because it'll earn him an undeserved bad reputation.