OK, I use youtube just for listening music and watching videos. I don't upload, and I don't comment. Sometimes I do like some videos/comments. 

But today I accessed my channel and I saw like 20 comments from my account.

They looked like this: 

> 
> "Yes i mean it. this is really fantastic. and i can tell u , really
>  lucky that i registered and got my dream fresh products from
>  maybelline for nothing :). its worth a try here => "
> 
> 
> 

Any ides on how to prevent this in future, or report. Any idea is appreciated :)