Well, I guess kids really don't need to be cruising a knife forum. Teenagers are a different story.
My wife and daughters are free to look at this forum, and all of the sub forums, including what may be termed as' offensive language' or even 'offensive emiticons'. My wife can decide for herself if she likes it, or considers it offensive. It is not my job to shelter her from such things. She is an adult, and quite capable of making her own decisions. My daughters are teenagers, and would find that emoticon quite funny.
In summary, I don't find that jerkit smiley immoral. I don't find naked women immoral either. Neither do a lot of people here. yes, we have forums for such things, and those things are contained there. The jerkit smiley was placed on here by the owner of the website. If he decides to restrict its use, or if one of the mods restrict it from their forums, then so be it. otherwise, it is free to be used wherever, until the owner says no. And, for the record, no amount of complaining or posturing will change that.