First of all Gizmo, let me apologize if I've offended you. It's not my intention.
"Common sense" is a misnomer because that's all culturally dependant. If the sense here really was "common" then there would be no reason to explain it to the players.
The phrase "Common Sense" is an idiom. The meaning is not derived from either word or their logical combined whole, instead it is determined by a traditional meaning assigned by the majority of english speakers.
I'm not referring to some commonly held ideal, well... not directly anyway. But sufficient wisdom to realize that if a particular interpretation of the rules seems too good to be true, then it probably shouldn't be interpreted that way.
"Too good to be true" is such a cliche, that I feel it falls under the bracket of "Common Sense".
I apologize if my choice of words was offensive, but that's how I see it.
I may of course be wrong.
The fact is that the DM has a certain *opinion* about how a rule ought to be used, and it's his job (as the DM) to make sure that this opinion is incorporated into the game.
I disagree a little with your choice of words there myself actually.
I don't think that the DM's job is to enforce their opinions upon the game. The DM is an elected official, of a sort, entrusted by a group of players with authority and responsibility to adjudicate the rules on their behalf.
Although the players choosing them as DM can be seen as a mandate of sorts to run the game style the DM wants, ultimately I think they're responsible to the group and should be running the kind of game everyone can enjoy and get behind.
Calling that opinion "common sense" IMO is patronizing and insulting to the players.
I don't.
I think that practised spellcaster should benefit warlocks. I introduce this as a house rule in games that I run.
This does not mean that I think anyone who disagrees or finds the 'spellcasters only' argument more persuasive lacks "common sense".
But if someone says
(as an extreme example. This is not meant to typify your viewpoint as a strawman, or to invoke some kind of slippery slope argument. This is for illustrative purposes only)...
As I was saying, if someone says "But it never says you can no longer take actions after you die, therefore my character can", then I would describe that as lacking "common sense".
This may be a subset of disagreeing with my opinion, but it is not the entirety.
Many of the suggestions I've seen in this thread would not fly in any group I've ever DMed for.
I agree and feel the same way.
However as my comment was merely addressing the reason why rule changes are introduced to cover problematic rules, I fail to see the relevance.
My players are not under the impression that our differences in opinion stem from their lack of "common sense", and I would expect them to be rightfully offended at the suggestion.
Nor are mine. In fact as I specified at the end, I've never encountered this problem in real life.
While we disagree, sometimes a great deal, it is not because they lack common sense... at least not in my opinion. We merely have different ideas.
Some ideas though seem to me to lack common sense.