Comments pointing it out are good. I'm replying to you though because this is the first time I've ever heard anyone say that not wanting to look at marketing/PR/astroturfing is censorship. Lots of people disagree about what is or isn't that stuff, but never that blocking it would be censorship. Interesting take, thanks for your contribution.
And i don't think flagging is the answer, leaving a comment to educate the readers is better than trying to censor things