Available for free use, just don't claim it as your own, obviously.
"Blocking: the #1 way to tell that someone has lost the debate." Let's be honest: if you're having a reasonable debate (I'm not talking about a fight) and the other person blocks you, they probably did it so they could get the last word but knew you'd be able to easily refute it, right? That's certainly the way it goes for me, at least. I laugh when people block me because it's so obvious why they did it. And then there are the idiots who block you before you even respond to their comment. If that doesn't show how unsteady and unsure they are in their idea and how intolerant they are of differing opinions, nothing does.
I don't harass, stalk, or maliciously follow anyone on the internet. If someone wants to stop debating with me, all they have to do is stop and I'll leave them alone. I have never and never will bully or harass someone on their profile page or their other deviations over an argument or debate that we had on, say, a stamp or journal of theirs. I'm a safe person to debate with and most people sense that straight away, so when I'm debating and someone up and blocks me, it's pretty obvious that they had no good arguments left and they just wanted the last word. I just think it's funny and way too predictable!
However, blocking is not always a sign of defeat:
1) Please note that blocking comments on a deviation is different. Most people do that not because they are afraid that they don't have a valid argument but because they're afraid people will post bullying, threatening, or otherwise harsh comments on their deviation. Not all, but most.
2) People also do well to block if a debate has turned into a pointless (like an is-to-is-not) fight or if they feel that the person on the other end is threatening them or others. I have blocked before when someone has turned a debate into an immature fight, or when I feel that my personal safety could be threatened by that person.
3) Blocking is also understandable if someone is spewing downright hatred or open intolerance towards you or others. For example, I once blocked someone because they openly admitted to hating a large demographic of people. I don't want to be associated with angry, hateful people. However, someone would have to do something very hateful for me to block them on accounts of their opinions/emotions. I’m fine with opinions, just not hatred.
Feeling unsafe or having had enough with immaturity/hatred and wanting the last word are two different things.