True?

[Niwashi]

It will go to the last person to send you a tell.

The only problem is that it goes to the last person who sent one, regardless of whether you saw it or not. So, for instance, if a friend sends you a tell, but immediately after an RMT spam-bot who you already blacklisted sends you a /tell, the blacklist will keep you from seeing the spam-bot's tell, but the reply feature will still regard them as being the last player to send you one, rather than your friend you last saw a /tell from.

Alt-r does the same, but since it only fills in the "/tell <character name>" part, you get a chance to spot that that's not the right name.