They bash people for adultery. What they don't bash is that they themselves create many of the conditions that lead to adultery. This happens when the relationship stagnates (no oral sex, spending time together only in field circus, etc.) or when the husband becomes a tyrant. Usually, in the tyrant-husband case, the wife will be forced into doing what he wants all the time. This leaves no personal freedom, and she doesn't desire any sex from a tyrant. This causes him to "need" to seek sex elsewhere, and adultery results. Notably, the congregation itself encourages the wife to be in absolute submission to the husband, except if he wants her to break the congregation rules.
Another thing they bash is regular fornication. I see nothing wrong with regular fornication--even if two same-sex people freely choose to have sex with each other. However, coercing children to get baptized at age 6 under threat of being destroyed is wrong. Then, too often these children get on hounding calls--itself immoral. The subjects are usually things like questionable attitudes toward holidays or having "bad" songs. As if this fun-killing wasn't enough, a significant number of them are molested during these hounding calls and then silenced about it. The hounders doing this are as likely as not to be doing this just because they get their kicks out of ruining children's lives. And yet, they have a cow when someone commits regular fornication.