"These people who throw milkshakes could be throwing acid"
No, they couldn't. They made a conscious decision to throw a milkshake at someone because a milkshake is not going to hurt that person. It won't burn them. It won't injure them. It won't damage them in any way other than to get milkshake on them.
Throwing milkshakes and throwing acid are two WILDLY different things and to try to suggest they are the same is just bullshit.
It's like throwing a chair in a pool and throwing a baby in a pool.

This was one of the replies to the post, and it just made me smile, so I thought I'd include it :)