Football supporters, in general, cannot be trusted to behave. That's why we don't have alcohol in Scottish grounds, why you can't drink in sight of the pitch and why we don't have standing in major stadia. Past examples have proven this and this is why "responsible" adults are not offered the choice.
And there's no point complaining that it's just an English football/Old Firm problem. It's one rule for everyone I'm afraid. So instead of being "militant" ( ) about safe standing, why not be "militant" ( ) about creating an even better atmosphere within Fir Park?
It's a moot point anyway, what SPL team, outside the Old Firm, has the money to invest in a safe standing area? None of them.