In our troop, the rule is no 'electronic entertainment'. This means that a scout shouldn't bring his games, music, videos, etc. Electronic tools are not forbidden.
This rule is in place to limit the distractions at camp. I have seen cases where a scout brings his entertainment with him, and spends the week in the tent rather than participating in the scouting programs. Some devices can also be very distracting and annoying for those around. (Very few camp neighbors want to hear your music all night.)
I did have a boy (and his parents) come to me once for special permission to bring his headset music to camp. This boy has a mild nervous disorder, and is unable to go to sleep without music to calm his mind and nerves. This exception to the rule I would allow, but only if he can be responsible and use it ONLY as needed.
On recent camps, there have been several of the younger boys sneaking their devices to camp, and then staying up all night using them in their tents. I think some of them actually think the leaders are unaware. An occasional sleepless night is not a big problem, but when it keeps them from being able to do the activities the next day, or keeps other boys up, it becomes a problem. I think it is time that a few of the boys get 'caught' breaking the rule.
In the case of HAM, I have not had to make the judgement call, but I think it depends on it's use. The original post did not say why he was in the tent 'operating'. It sounds like in this case it MAY have been electronic entertainment. I won't argue that it can be a tool, but it can also be a toy.
