Part of the game is not to close the side channels of information. conventions for calling are very much part of the game. calling 1 Club vs 1 No Trump is a purposeful signal.
Its a fun game to play if you don't take it too seriously
I get that, but the reality is that people who take the game too seriously have long been doing this. Just because reality is not legal doesn't change the fact that it is reality. This is why not taking it all too seriously is so important.
As I say, when you play against people doing this you can use it as a tell. Of course you can get angry and bang on about the rules as well.
How about 1 club vs. One cough club, instant 1 club vs 1 [3s pause] club or 1 club spitted out with a visible disgust?
I think it is all part of the game. Good opponents learn to read your signals as well. Think of it as reading a tell in poker.
No, it is not. Perhaps your circle likes it like this, but elsewhere this is cheating. It is forbidden by the rules and is socially unacceptable.
it is not about liking, and in my circle we swap partners and play with whomever is there, but I have played against competitive pairs before and it is clear it is happening. reality is how it is, not how you want it to be. this is not a hill worth dying on and this is why I will never take the game too seriously