Please, for the love of all that is holy, stop doing this.
Almost every other ranked game I play, someone will die within the first 5 minutes. It's bronze; stuff like that happens. But what really grinds my gears is when a teammate says "gg" in chat after that occurs. It demoralizes the team, and it spreads that individual's negativity to the rest of the team as well, thus greatly increasing the possiblity of said team overcoming the slight early setback and winning.
TL;DR- First blood doesn't mean gg, so don't act like it does :P