You don't want to block a person, but don't you want talk with that person, too?

Just ignore it =D
If you want, later on, know what the person said, the program can save all conversations in a text file.

This is a screenshot of the feature. I'm sorry the language... it's Portuguese, for the time being.

In personalized alerts, you can change immediately your status.

And a lot of other bug-fixes, from the actual released version (5.0).