an eruv in a reshus hayachid is ok.
Right. No one argued against that.
You, however, said that a perfectly valid eruv becomes pasul if it is misused. The context was in boys playing ball within the eruv.
You said:
I have seen people playing ball in the street and i’m not evening talking about the fact that your not suppose to play ball on shabbos but….
My response to that was (bolding mine):
If there’s a problem with playing ball on Shabbos, then educate people on that aspect of it — don’t conflate it with carrying.
In any event, I agree with you that there are people who might abuse the rules regarding carrying on Shabbos with an eruv — but that doesn’t detract from the validity of the eruv itself. If it’s valid, then it’s valid regardless of the fact that some people may choose to abuse it.
Your response was:
no wolf, that invalidates it.
IOW, you held (and gave a source from some sefer that no one ever heard of) that if someone misuses and eruv, that makes it pasul.
So, I’m advising you that since you don’t know for sure if anyone in the camp is misusing the eruv (and making it pasul according to your position) that you should not use the eruv. After all, chillul Shabbos is a serious matter. As you said:
Shabbos is Shabbos, and it is unadvisable to play with shabbos
The Wolf
(Source thread: http://www.theyeshivaworld.com/coffeeroom/topic/eruv-in-brooklyn/page/2)