I don't invest into meme-coins (because they are shit-coins for me) therefore i don't really follow the news regarding Shiba Inu that closely. I think though that the founder of Shiba Inu should be a pretty well known man by now as Shiba Inu was the most successful one among all those hundreds of second generation meme-coins that came out in the last months, so i don't think that deleting all social media posts would not really help him to disappear.
That is why i don't think that this is a sign for a rug-pull that is coming shortly. I also think that a complete rugpull is not even possible anymore with Shiba Inu, as it is also listed on centralized exchanges by now. Of course if the founder of Shiba Inu would dump all of his tokens at once then this is pretty much the end of the project too..rugpull or not.