If you follow their suggestion then you might as well not waste Blizzards time by reporting it since they are not going to consider it harassment.
- unblocking them makes it not harassment
- replying back makes it not harassment
- you don’t need to document anything, Blizzard has the chat logs. The only thing you need to do is submit a ticket every single time they contact you. every single time.
In the end I can 100% assure you that they will be actioned and if they do it after that they will be permanently banned from the game on that account. I know this from personal experiences.
While adventuring through Azeroth and surrounding lands you will encounter a myriad of other players. They could be out questing, exploring a dungeon, trying to smash the opposition in a Battleground, defeating a raid boss, or simply hanging out in town. The certainty about an online game is that you will likely be engaging with these other players to one degree or another. Some communication will be helpful, adding to your experience in a positive way. Other contacts may not be so rewarding. W…