Not litecoin, but litecoin testnet: more like 11 MH/s
but is it worth it?
there's no need to prove anything by attacking, just go to hash rental site and see how much it costs to rent that for an hour.

edit: I felt attacking POS was needed to prove the point, because the point has been made and ignored many times.

I'll say it again just in case: you don't need 51% of the supply, you need 51% of the staking weight (actively forging stake, or whatever you call it). And for most coins, that's about 5% of the supply. There's no secret attack. Only splitting the staking weight so it's not affected by each block you mine/mint/forge/whatever.