I don't know, I'm pretty wary of this Grumpy Cat character, especially after seeing so many people state they've been flagged by him despite following the 3.5 day rule.
As for the spammers, the problem with reporting them is the fact that many of them have higher reputation scores than the legitimate accounts do, and if we flag them, they can literally destroy our accounts by flagging all our posts to oblivion.
Only the biggest accounts have the power to bring those spammers down, you can't expect newer accounts to be able to do this. I wish I could just flag those spam posts, but I know I'm putting myself in the crossfire if I do.
Moving forward, I'm just going to report them to Steem Cleaners and let them handle it. Its better than starting a cat fight and being harassed endlessly.