This is going to be an unpopular opinion but I really don't think it's complete FUD like the other posters suggest. It is old news being recycled for sure, but that doesn't mean there's no substance to it.

The difference between this material being on youtube vs the blockchain is that the blockchain is public and immutable.
Youtube can remove the content at will, magazines containing the content can be removed from publication and destroyed, whereas this material stays on the blockchain forever.  There is no method to remove that data once it's on there.

This means that if the govt decides at some time to bring down bitcoin they have a valid legal reason and technically everybody who has a copy of the blockchain on their hdd is in possession of highly illegal content and as such breaking the law.

Whether or not they decide to enforce it is another question but the analogies posted in this thread are faulty because none of those comparisons involve immutable media like the blockchain is.

To answer your original question I do believe it is a true cause for concern and if some particular SJW group decides to target bitcoin they have a very valid reason right there. It also doesn't help btc's reputation any considering the fact that it's been associated with the scum of the earth from the very beginning.