how to convince potential players of a fundamental rule?

[KampfHase]

Hi there, [img]/images/graemlins/grin.gif[/img]

I'm planning on playing poker (NLH) with some new guys & gals I recently met. Unfortunately, these guys & gals each apply individual rulings to the game. For example, they are not used to play with this rule:
A bet or raise must be at least the size of the big blind, or at least the size of the previous bet or raise in that round.
They told me: "You can raise to any amount you please (that means, if the BB was $10, one may raise to just $15).

Here is were the issue comes in:
- I want to play the game the way it is written down in RRoP, because I think that it's the most common and best way to play it (which would include the rule mentioned above).
I told them about my concerns and they asked me why this rule (raise at least BB/previous bet/raise) existed. They are probably of the opinion that this rule limits your strategical possibillities (because you are forced to bet a minimum amount that might not please your strategy).
Well, I stated that this rule prevented players from making annoying minimum raises (like, raising a BB of $10 to $12) that are just time consuming and that do not have significant impact on odds, and the like. Well, it appeared to me that this didn't really convinced them (maybe because they never heard of "odds, and the like").

So, thing is, I want to play with these guys & gals because I haven't been playing for some time, so I would sooner or later give in and accept this rule to be ignored if it turned out that I was not able to convice them, BUT: I am still trying to convince them and I was wondering if there are some more arguments that I could point out, that this rule in-hand makes sense and is worth being applied.

Long story, sorry if that bored you.

Thanx in advance. [img]/images/graemlins/grin.gif[/img]

KampfHase