Simple yes or no poll. No option for people unable to make a judgment
I believe that they are not good for the future of the Mojave. All four of the main factions want them destroyed. Caesar requires it as does House. Yes man strongly suggests it but lets you make the call. The NCR Col. Moore sends you to kill them, you can, if you have done some quests for the BoS, suggest a truce but that is your action. It is not what the NCR wants you to do.
If everyone thinks that you are the problem then perhaps you are the problem.
In the Yes Man endings, after the NCR is sent packing, the BoS patrols the highways harassing travelers. Both McNamar and Hardin do this.
In the NCR ending, if you got the truce, the BoS patrols the highways. It does not say that they are looking for tech, it also does not say that they are their to protect people either.
How does the continued existence of the BoS benefit the Mojave?
In an independent Vegas protected by high tech improved Securitrons, how long would the BoS allow that to continue? The new upgraded securitrons would certainly qualify as high tech and would be a threat to the BoS. The courier would know where the BoS is located and would have a robot army capable of wiping them out at any time.
In an NCR ending the truce is temporary by definition, it is not a peace treaty. The war continues back in California. The current agreement was purely for coming together against a common foe, the Legion. Once that threat has been dealt with, how long do you imagine that the truce will hold? The location of the BoS bunker would be known, and Col Moore and others with her opinions, would no longer be threatened by the Legion. They would be free to take out the terrorists who destroyed the gold supply and the economy of the NCR. When the BoS inevitably comes into conflict with a major caravan company, the political machine of the NCR would come up with a reason to recommence hostilities.