Looks like LL has plans to start blocking 3rd party viewers that have feature sets they don't want to allow. Some of those feature sets (such as copybot or ban dodging) we would obviously want to be blocked, but what other features would LL want to block? And the more important question: would it even do any good when any 3rd party viewer can just spoof itself as an approved viewer?
https://blogs.secondlife.com/community/ ... wer-policy