By the time you realize there is an issue and manually put out a text message, every automated BOT in existence will have already executed a trade. Not to mention by the time your recipients get the text and react everyone else would have already got a twitter feed and reacted sooner. I see no benefit in your system.
A tool that prevents you from panic selling would be more valuable.
very funny, I wish I had such a tool, once I was very stupid being in a hurry sold too much 
If you panic sell before most, wait a little bit, you can buy back and have more bitcoins.