"And I do think multi-use tunnels would heighten security concerns. More to disrupt."

Security concerns.....? OOOH, BE SCARED, BE VERY SCARED.... of "scary tunnels" where bad guy may lurk and do evil.

Well, I guess it's a good thing we have you (should we call you "Mighty Mouse" from now on?) "on guard" to "protect us" and to "warn" all of us, about the tunnel security issue, obviously based upon your many years of education, experience, and proven expertise in that field, right?

Since you've repeatedly shown yourself to be a gainsaying fool, with no work history, or evidence of any serious knowledge and/or experience in doing any of this kind of work, what makes you think I would give a flying fu#k what an idiot like you might "think'.