Hello,
the subject explains the suggestion. At the moment, it is very easy to press CTRL+B, and accidentally block somebody. Would it be possible to first ask if you are sure before performing this action?

In the past, this was not so important, as you just press the same key and unblock the person. However, now you also have to add them as a friend again if you were friends, wait for the request to be accepted, and further in case that person was a favorite re-add them to that list too.

Thanks.

+ 1 I (mostly) accidentally blocked him 5 times in the last 8 weeks. :D