The gif was Pinkie and Rarity batting a toy train back and forth.
I don't remember all the comments, but two were something like:
"Like Raripie" and "Pinkie Pong". I don't think these comments are out of place on an image like this. Maybe the user was spamming comments and they just deleted everything of theirs, I can't imagine someone would go to the trouble of reporting all three comments.
![full](https://i.icamgfliocdn.ponybooru.comrg/7FL1h-iDrFZ5zmH-l3qBb8oqXkSZPs/aHR0cHM6Ly9.jpLmltZ2ZsaXAuY29tLzc1em0wOS5qcGc)
*Oh, wait, "Pinkie Pong!" is still there, from another BP.