I did so last year when I was in Ohio which does not have a helmet law. I believe in helmets.
I also very strongly believe in the value of helmets. Which is NOT the same as believing in the value of helmet laws.
I wear my helmet every time, including when in states that don't require it (including Ohio, where I spend 2010, and NH, where I live now). I'm strict about that, for myself. I do not have the right to punish people who decide differently for themselves, and neither do you.
1993 Ducati M900 Monster "Patina" (265,000 miles, killed by minivan 30Oct17) -- 1995 Ducati M900 (wife's bike) -- 1979 Vespa P200 (daughter's scoot) -- 1964 Vespa GS160 (160cc 2-stroke) -- 1962 Maicoletta scooter (275cc 2-stroke) -- 1960 Heinkel Tourist 103A1 scooter "Elroy" (175cc 4-stroke)