Question: In my open-space office our 5-man team, "A" sits next to 8-man team "B". About 3 weeks ago, a colleague from HR came and asked team "B" to mind their behaviour because they were rather loud and tended to swear quite a bit.

In order to accommodate quickly, they decided that for each curse one has to throw some change into a jar. Their method proved effective, as they control each other strictly.

About a week later, they suggested that our team join their "jar fund" and everyone except me agreed to do so. It is not a matter of the insignificant fine amount, but rather that I do not wish to be monitored in such a manner, despite the fact that I hardly ever swear (definitely the least of them all). I explained why I wouldn't take part and deemed this issue settled.

However, one team "B" member keeps nagging me about paying the fine for my grand total of 2 curses (something silly like "damn," no less) basically every day and completely ignores the fact that I'm not taking part. I clearly let him know multiple times that he's being annoying but he doesn't seem to care. At this point, I've definitely ran out of patience and will probably get very unpleasant very soon.

Generally, I would not hold back but I don't want to perform a full-fledged rant at work.

I could notify his superior, but I would rather deal with it personally. To make it clear: I no longer care about having a good relationship with that person, but I don't want to be "that guy" who reports others for generally insignificant reasons.

What is the best way to handle this situation?

**Update:**

So it turns out that the problem fixed itself as the nagging coworker received a notice due to multiple complaints from the client regarding his lack of commitment and work ethic and was allowed to leave immediately.

Answer: 
Next time he mentions it...

Calmly, pull out your wallet, pull out a $10 or $20 bill, make a giant and flamboyant gesture of walking over to the jar. Make sure you get everyone's attention. Make sure everyone sees the denomination of the bill. Even hold the bill stretched out right up to his face. (Always smiling of course.) 

When everyone is watching, slowly put the bill into the jar while announcing that you are pre-paying for every swear you will make till the end of your career.

Alternatively, as J.R. suggested, you could go about it in an understated way. You probably know what is appropriate and will work best between you and them. 

Walk away and tell them to stop bothering you about it. 

Get back to work.
Next time he nags about it, just look at him in the eyes and say all the swear words that come through your mind.

More seriously, if you've already explicitly told him you didn't take part in the jar thingy (i.e. explicitly stated *"I don't do the swear jar. Please stop pestering me about it."*), having a talk with his team leader could be rather harmless if done correctly and defuse the situation rather than going straight to HR.

If you go to the team leader for this issue, be sure to expose the problem while trying not to make a big issue about it or throw blame on your coworker. Something in the line :

> 
> Hey chief, you know I don't participate to the swear jar, right ? Could you have a quick word with Bob to tell him to avoid reminding me to contribute to it ?
> 
> 
> 

If Bob takes it badly it could reflect on his behaviour toward you and may lead to him / the rest of the team putting you off as a negative nancy.