Is "Untitled" a protest song?

Not really, on their wikipedia page it says

'Over the last few years, a lot of people we know have been involved in tragic accidents caused 의해 drinking and driving. One of the students at our high-school crashed his car driving back from a weekend trip and killed his best friend. It was a very sad time that none of us will ever forget.
When an accident happens, there are 더 많이 victims than people think, and many lives are changed forever...Parents, brothers, sisters, sons and daughters, grandparents...everybody feels the impact.

We wanted to tell a story with this video: the story about all of the innocent victims affected 의해 drinking and driving.'

It's also been used as an anti-drinking driving campaign.