I never used to thirst people in season one and two. With the rise in trolls, bad player, cowards and potato players I almost always Thirst if I knocked them down. My stats took a hit in the first 2 seasons compared to the last three seasons.
Nothing is better doing 570 damge (no sniper rifle) and 0 Kills because your team can't take out one person and your left trying to finishing off the squad your self after taking a massive damage hit and losing because You needed to heal a little bit.
Also;
I do thirst the downed players sometimes that were knocked from another person. if their is more then one team in the area battling it out don't want to take on a another full squad that is healed and lose the fight. One squad of three and a squad of two is easy to take out then worrying about that two full squads could be coming for you, It just makes it easier to deal with.
It's a BR game it's all about winning, I do what ever it takes to win I don't care anymore. As long I'm winning it legitimately and I'm not cheating I don't care how I win anymore as long it's a win.