A crazy number of readers have written in asking what they should do about unsolicited instant messages coming in from their Gmail accounts. The messages are from a site called ViddyHo urging them to “check out this video.” I hope most readers will recognize the link provided in this chat invite for what it is: An invitation to give your Gmail credentials over to criminals. A quick check of the ever-sobering Google Trends feature would telegraph that this is a scam that has ramped up extremely quickly. Your best bet: Just say “no” to ViddyHo. And that goes ditto for any other unsolicited chat invites, regardless of which instant messaging platform you favor.