Is this frame safe to ride?

Yeah that bike should be fine, for polo.

Sorry to be harsh but there is a surfeit of people on here too concerned with style with no-skills, be it bike, balance or basic maintenance.

Did you read the London Lite by chance?

I was working on my skills when this happened, was practicing skids ;)

No, never read it.. Know it's a free newspaper, but was it anything in particular there?