I'm not saying "don't try", I'm just saying "I think what you are attempting is foolish and that you are just going to kill a bunch of people", that's all. I can express an opinion about a potentially deadly venture, can't I?

I wasn't suggesting that you cannot have an opinion. It's a perfectly valid opinion. I was implying that as a society we have a tendency to impose our opinions on others through laws and social pressure.

A lot of large engineering projects have killed a bunch of people before succeeding. It's fine, as long as the people accept the risk, and aren't deceived.

Please don't comment like this here.

How is an opinion dictating anything other than expressing someone's skepticism?