Thomas Shey
Legend
There's a big difference between a house rule that's adopted to better fit the needs of the group, or to fill a gap in the rules that the group has found would be better served by having a specific rule, and house rules that are used by the GM to make their railroading more artful.
I would suggest in many cases this is in the eye of the beholder. Not helped, admitted, by the degree of opaqueness many GMs present about their reasoning for a given house rule/ruling.