I think many of us see the potential for misuse (just like we foresaw Quick Chat being misused), but it only stands to reason that because we see it, we try to keep ourselves above it. If you have to say anything, try to be constructive, don't instead lend validation to the misinterpretation that PvP is so toxic and full of harassment. And if you receive a nasty tell, don't reply, just ignore or report.