Condoning the wrong

Q: How do we respond to the foolish and stupid statements of fellow laymen when they comment on Deeni matters wherein they utter completely incorrect things? Like those who comment on the Qur'an Sharaeef, Ahadith, Masaa'il and the Auliya with their own concocted reasoning and personal thoughts. Not salafi's etc., but just fellow faasiq lay people who act as Deeni experts. Many a time, one is not in a position to reason with them, or there is the fear they will utter even worse commentaries on the Shari'a. When these people utter their statements of personal, clear-cut haraam, reasoning, can we respond by saying 'Ok' - maybe it is a neutral statement (I do not know)? Or will Allah Ta'ala punish us for not arguing the Haq despite these people being stubborn with their commentaries on Deen?

Zakaat on gold for previous years

Q: Kindly help by giving us the amount to be paid as Zakaat for the following jewellery (Kindly note that the owner never had any excess cash all these years, people would assist her financially; the jewellery was given to her as a gift in 1985, she now wishes to sell it in order to pay for the Zakaat of the past years). 21 crt bangles - 75.80 gr, 18 crt bangles - 66.90 gr, 18 crt broken gold - 116.50 gr. ( For my information I would like to know if the quantity/amount of gold will be reduced each year when calculating, as the lady never had any excess cash, and if she had to sell the jewellery to pay for the Zakaat then the quantity of gold on would decrease each year by 2.5 percent).