meh ... haters gonna hate.
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+1 on this.
Someone is always going to question something you do, something you are, or something you believe in. As long as it doesn't directly impinge on your health, job, or put you in jail, they have a right to whatever goofy reality they want to think. Best to ignore it and move on to more important things.
That being said, it does present an excellent opportunity to reply with a statement that educates, rather than insults. Unfortunately, sometimes our own eccentricities or tastes often do not have a logical reasoning behind them.
My friends use all sorts of tools for work. They always make fun of my little Gerber Curve... until they realize that they keep leaving their tools in the truck and want to use it for it's bottle opener (after hours... of course).