- emphases mine
There are a few BSA (and GUSUSA) programs abroad, through Direct Service and overseas BSA councils. The G2SS rules are the same, there is no more boldface in the G2SS and they are guidelines, but should be read and complied with wisely.
In many other national Scouting organizations, often parents are titled Commissioners and the Scoutmasters are what the BSA would consider BSA College Reserve or Eagle Alumni. When camping with other Scouting organizations, it is sometimes wise to discuss the American traditions so that other leaders become aware of our separate sleeping and sanitary concerns, or restrictions on alcohol during events, and our program safety concerns. Many other nations Scouting organizations would assume we administer the program the similarly. Such as, rappel without belay, dive without a buddy, sleep/shower in the same facility and enjoy a beverage around the campfire. After learning a few of our similarities and differences, most other Scouters are happy to abide by our G2SS for a brief weekend.
Scouting Forever and Venture On!
So if I am reading you right, you are saying if we are guests of a foreign scouting group, we should impose our rules on them? How is that Courteous? If they were visiting us, would it be reasonable for them to impose their rules on us?
I agree that being aware of differences is important and discussing them with a host beforehand is good way to avoid surprises. But the solution isn't to ask them to do things differently, but to be aware that we will be doing things differently and to figure out how we can integrate ourselves with their way of doing things. After all, one of the whole points of visiting a foreign unit is to expose everyone to ways that foreign scouts are different and alike. Just be aware of their rules and have a plan before you get there.
If their leaders have a tradition of a late night toast around the campfire with an alcoholic beverage, don't ask them not to do it, instead tell them our leaders will be joining them but will be toasting with juice or water instead. If they have fires in their tents, don't ask them not to do it, either have your scouts in their own fireless tents or let them experience it for one night with the foreign scouts (after all, aren't experiences like this are part of the point?).
If you are staying at a foreign scout camp (such as Kandersteg International Scout Centre) the camp will be run using the rules of the sponsoring organization, you need to know what those are and how to adapt.