The only thing in this world that could use a filter is my mouth, more and more I say things I probably should not say. On this site that is not the case I try to refrain from curse words but don’t let that fool you for I am a curb side pro when it comes to profanity. Should be awarded for my talent and use of bad words.
Of course this is not the case I will never see nothing for using bad words. That is why I decided to put a filter for clean water, furnace filters changed every three months, air filters on the car changed yearly, oil filters changed as needed. And so on and so on.
Could even settle for a filer for the lens.