For PMs? Nope. Shoutbox, maybe it's coming soon.
While I really like the idea, I don't think everyone will be participating in this new section due to many reasons. And we can't make a section for 2-3 topics.
This has been debated a lot on iOSGods and we do realise it's really annoying. We tried to decrease these type of posts by adding a thanks button but people still continue to post "thx" around the forum. We have also added some Posting Guidelines which appear right before you reply to a topic and we're also actively warning users for spamming "ty", "thx', etc.
We can also add a minimum character limit in order to reply, but we believe that would make the "ty" to "tytytytytytytyty" so they can pass the minimum character limit.