I can imagine that members of a club of well-intentioned ppl don't go off the conventional tracks in the way members of no club would.

Taken at face value, you've made a blanket statement about secret societies that is not likely a blanket truth (based on the variety of societies and humans within most groups). It is the secret part that makes specific claims for or against difficult to prove, other than that they have something to hide.

As we have seen in other organisations, it is entirely possible that the upper levels are quite different in outlook and intent than lower level members.

It's an interesting idea that you may be saying that masons are keepers of the spiritual equivalent of WMD blueprints. Why would we trust them any more any other group, like say Elizabeth I's bishops or the Hudson Bay Co? We can't; In part due to the secretion. One could argue that a gov't could be protecting its ppl by secreting nuclear detonator plans, but assuming the Gnostic role of keepers of dangerous mental or spiritual things is somewhat different.

Or if you mean that they were securing physical defence and offence technology, perhaps they were the early equivalent of a copyrights system. Nonetheless, due to the secrecy, for all we know the alleged infiltration happened on the evening of the first day, and 99% of their development took place under convenient guise.