Sadly some people not only fall for this, they go to the link and put in their account information
Blizzard will NEVER ask you to go log in and give them info to prevent a penalty. Never.
They have a special chat window and blue Blizzard icon if they do message you, which is exceedingly rare.
The only Warning in game from Blizzard is a chat warning that is auto generated - it does NOT require you to go to a link or enter information. Just letting you know to stop spamming or whatever.
If you ever get a message you don’t trust, right click report it. Real Blizzard messages can’t be reported - scammers can.
Here are the two articles you will want to read about Phishing, and about the real Warning.
Chat Phishing
Game Masters always have a tag next to their name. If the tag isn’t there, but the person you’re talking to claims to be with Blizzard, it’s a phishing attempt. We also cannot contact players inside Diablo 3, Hearthstone, Heroes of the Storm, Overwatch, or StarCraft.
Please report players impersonating GMs so we can take action against them. This will also place them on a temporary ignore list so you can keep playing without receiving additional messages.
Haha… no. The oldest scam was “/yell ********* ********” followed by “/yell holy crap! if you yell your account name and password it automatically blocks the letters!”.
Its a Scam big time…Blizzard GM’s no longer contact you in game anymore and besides if a GM ever did their chat would be a separate chat box from your normal game chat box…and it would be in Blue…the border around the box would be blue…the chat would be blue lettering…ITS A SCAM DON’T chat and go change your password right now.
Blizzard in-game GM conversations occur through a pop-up message window in blue text with a big Blizzard logo, any DM you get through normal chat is a scam.