If some enormously graded LT fell to #16, then, sure, pick him. LT is such an important position that if you're sure the long term answer is on the board, then you pick him.
I just think that's so unlikely to happen as to be irrelevant. The truth is that our tackles are not the problem, unless the medical staff has really bad news about Lucas' knee. Given the holes at QB, interior OL, DL, LB, and S (provided they cut Yikes and Diggs, which they should), I'd rather see them take care of those positions.