No, I didn't. If you're going to be using something like that, it's your responsibility to check, especially when you SAV it yourself. Serebii's page made it clear that Politoed cannot learn S-toss in Gen V.
EDIT. Also, I must point out that I was not the one who blacklisted him. Yes, I presented the case to a mod, but it was WildEep and Toothache who made the verdict. It's not my job to warn someone to hack better.