Try adding "/about" in the url after the user's channel name when you're on their profile, and the "About" page should show up with the "Send message" button.
Try toothpaste, which works really well for soot and scorch marks. Put a thin coat of toothpaste across the scorch, leave for 10 - 20 minutes, then clean off with...
You should not see a doctor unless you have blistering and cracking skin. If you temperature is elevated or if you are having signs of heat exhaustion or heat stroke...
Google Earth no longer accepts nor uses user-generated buildings. The old ones are still available through 3D warehouse, but I don't know there's an option to download a few blocks...
In the vast majority of cases, they're just sending out phishing scams with email links, or fake websites. Some of them will try to install some malware on your PC....