There is no evidence whatsoever that Scott had ever harmed anyone else with these weapons, nor that he had any intention of doing so. As Lord Uist remarked to the High Court in Edinburgh on sentencing him:
It is probably impossible to say what, if anything, you would have done with the weapons had the police not intervened.
He explained that Scott was guilty not because he had actually hurt someone else, but because:
There must have been at least the possibility that you would have used them to cause injury to others.
Granted, the man had an autism - type disorder, and had been collecting various weapons, parts, and ammunition. However, I can sum up the situation in one word: Thoughtcrime!