I have no doubt that you're nice and kind and want to make a colony somewhere out which is open to travelers.to be honest i am not bothered about other players..... if i did colonise such a world i would leave it open for everyone - so long as they could not break it - nothing puts me off open world crafting games more than the ability for other people to just go into your base and blow it up for lols.
but given nothing in elite so far has given players the ability to destroy anything other than ships or avatars which are replaced on destruction, i highly doubt we will get destructable environments.
hell to be honest i would not be bothered if a colonised base or even a player carrier was locked to solo and PG and no one else could even see it. it would be no skin off my nose personally.
Rest assured, there are people who are the opposite and want to hog Beagle Point, Synuefe VM-D, c15-10 2a Wepooe AA-A h509 and other interesting locations with their colonies and block them from being accessed. I mentioned it previously, we have that problem already with Rackham's peak (albeit a little bit different but with the same result: a beautiful but virtually inaccessible system).
Yes... I know the arguments coming now: 'in game mechanics allow it', 'play solo', etc. If that are the arguments, then my standpoint (10-30ly colonisation range is good enough) is as valid as theirs to create enough pandemonium.