Can you edit Twitter? They should have had someone take a look at the postings first. Or is this not possible with Twitter? Can you screen out receiving certain types of photos and messages?
Short answer: No.
Nope, anyone can post comments or pictures to a hashtag.
No. You can’t delete other people’s tweets.
The point of Twitter:
EVERYONE can post ANYTHING (legally actionable content excepted).
ANYONE can post in response to ANYONE.
EVERYONE can see EVERYTHING (you configure what you want to see by default, but can search for anything).
Your only option is to delete your own posts (which has no effect on responding posts).