Neighbor hit my library..
I believe it is already answered, but I could not find by search, so ask what is suitable…
I was a floor judge of modern PTQ. It was close to full of venue capacity (200), so player space was bit smaller than usual. Alan placed his library at right hand side. Bob, his neighbor at next table, placed it at left hand side, so their libraries were side-by-side. Alan activated fetch land, and hit Bob's library accidentally. Bob's library top were slipped off to his space.
Fortunately, slipped off cards kept its order and nothing revealed. So I put back those cards to Bob's library with the order and asked Alan to be careful going forward without any penalty. If Bob's library top was splashed and revealed any cards, what is the infraction ? or still no penalty ?