Since I was there, let me explain. Zachary went over to take a picture of MT, since it was down. He was told that it is now against park rules to take pictures of rides closed for maintenance. About fifteen minutes later Tony went over and walked within six feet of the same guys (directly in their line-of-sight) and took pictures of the drop tower with no problem, even though it still was shut down.
People can infer from that whatever they want. I would point out, however, that when we were at Tempesto earlier in the day, the staff clearly knew who Zachary was and that he was from BGWFans.
Yes things have fallen from the tower. I've been told by some of the employees there that bolts and such falling off the tower have contributed to ride shutdowns.
When people are working high up in the tower, there's also a chance something could slip out of a pocket high up in the air. I don't know if that's happened before but there's a good reason why you've got catch nets underneath the track on some of the coasters. I don't think the netting underneath Mach is enough to catch small objects like bolts though.
I think I was unclear, or perhaps I misunderstood the initial point.
We were discussing that Zachary was told that he could not take photographs of MT while it was closed for maintenance. netdvn raised the issue of falling objects, like bolts. I inferred that netdvn was asserting that the park wanted to keep guests with cameras out of range of objects dropping off the ride during repairs.
Based on the comments above, it seems that things have historically fallen off the tower while the ride was operating, which is a different issue.
I asked if anyone knew for a fact that things have dropped from the tower, while it was closed for maintenance, or if that was an assumption.
I would add that I hope that if Zachary stayed outside the barriers (which he did), he would have been in no danger from falling objects. If that is not the case, the perimeter needs to be extended for everyone's safety.
My guess is that they did NOT in fact tell Zachary that he could not take pictures, because they were concerned about falling objects, for both the reasons above and because others were allowed to snap photos unmolested.