You make some good points. Feel free to edit the wiki--that's what the wiki exists for, naturally.
I think my intent with #1 was that it's a permanent bond unless you die. Sazed couldn't just throw away his Shards.
You're right, Thucydides (by the way, a lot of these quotes have been found and referenced in that Shard article. There were 97 references when I finished it). The applicable quote is:
Darniil brings up a good point with his second question. Do we want to refer to Shardholder explicitly, at all times? I was using Shard, in this context, as the person holding the Shard, like what Brandon would refer to it as. Shardholder is more precise, I think. But as wiki policy, do we want to ensure that everyone refers to them as Shardholders? I don't know. My gut feeling is that we could probably use them interchangeably. After all, when someone says something like I did, that's technically canonical.
If I were to rewrite that line, though, I'd probably use the term Shardholder, but I don't have strong feelings one way or another. I think sometimes using the term Shard can refer to the holder or the power, depending on context.
What does everyone else think?
I think that was in the Hero of Ages epigraphs, but isn't that Sazed's speculation on the subject, not necessarily fact?
Here's the quote: