My rights under the 2nd Amendment are not responsible for other people behaving foolishly or dangerously, nor does their behavior justify a limitation on my rights. Personally I cringe at some things I see on social media, such as a video of a toddler, maybe 3 years old, shooting at a range without an adult within grabbing distance, or someone posting a "humorous" video of some young lady who has never fired a gun trying out a 44magnum or somesuch and almost killing herself, etc. People do see these things and think "guns are too dangerous for the average citizen to own and carry" and similar thoughts. But as others have stated, freedom means that each person is essentially responsible for their own behavior and just because I do not like something does not give me the right to prohibit another person from doing it.
I understand that with freedom comes responsibility, so especially in regard to my rights regarding firearms I always try to behave responsibly and appropriately and certainly do not knowingly make foolish statements or post foolish images that would tarnish the reputation of good gun owners.