You can bet coach Jim Harbaugh and the San Francisco 49ers would have questions this morning if a Minnesota Vikings player had unnecessarily struck top defensive lineman Justin Smith in the knee Sunday night.For that reason, I'll be interested in hearing the reaction from Harbaugh and 49ers players regarding the low block 49ers guard Joe Looney delivered against Vikings defensive tackle Kevin Williams. The play was winding down and Williams was looking over his shoulder as four Vikings players surrounded running back LaMichael James before tackling James for a 7-yard loss.