Allowing end users to kill their own session

I've seen a few ideas around how to do this while looking around on google, mostly involving using a PL/SQL wrapper but wanted to get the input from you guys on here too. What's the most efficient way to allow end users on a RAC cluster (particularly 11g) to kill their own session?

I know in 11g the 'alter system kill session' has changed to allow you to now specify the node in where the session resides, which is quite handy for a DBA, but still doesn't help the end user (Developer) trying to kill his/her own session. It would be nice if this is added as a feature some day but in the interim, are there any best practices or most optimal solution? I would think this would be a pretty common request for end users.