Discrimination is no laughing matter. How often do you see Sikhs constantly being discriminated especially when it comes to flights? It's often. I wouldn't support our worst enemies going through some of the treatment we go through. And sometimes this discrimination effects non-Sikhs as well with many of women getting sexually harassed by the Christian airport security.
if it coming in from the road open windows which open swinging out with a closed top else small opening with net curtain in front to slow particle entrance wipe window sills every morning where most of this stuff will settle . No shoe policy helps a lot in our house along with outside rubber mats and inside door mats which are washable at all outside entry points. Those wonder mats are great. . Regularly hoovering the porch/hallway also stops grit and dust travelling in.