
Maria Sharapova: It's safe to say that this scarf is currently my ultimate fashion obsession, snow or sunshine. It's the perfect fabric, color, and size. What is your current must have?
Dartagnan: No it is not always safe to wear a long scarf.
A Long scarf is always beautifull but we have to be carefull with it. 
For example the dancer, Isadora Duncan has been killed by her own long scarf caught in her car's wheel 
It is just a remark about the danger of a long scarf. 
"FOREWARNED IS FOREARMED"
Forewarned is forearmed is something that you say which means that if you know about something before it happens, you can avoid it.

"I'd love to open a tennis school for children in my hometown of Sochi." said Sharapova Maria.