This has (thankfully) become a moot point in the last years, but I'd still like some advice
I am horribly ticklish.
A light tickle is enough to keep me laughing for several minutes, unable to stop. If people tickle me hard enough, I lose control of my limbs and collapse in a giggling heap. It got so bad my body eventually started equating tickling with a physical attack and my "losing control of my limbs" turned into "lashing out": I'd wave my arms and kick, laughing hysterically all the while.
From kindergarten to high school, my various classmates used to find my reactions hilarious - until they got in the way of my arms or legs and got hit, at which point they'd go all "gee, it was just tickling, no need to be so violent!" as if I had done it on purpose. This would stop them, though only for a while: sooner or later they'd be back at it.
Tickling ambushes haven't happened in years, so now I can be tickled without automatically lashing out - however, I don't like being tickled. When somebody discovers how ticklish I am, I just say: "Yes, I'm extremely ticklish. I find it very annoying, so please don't do it"
Unfortunately, the world is full of people who take "please don't do X" as an invitation to continue.
What should I do if I run into them?
Is there some way to make them stop before they re-awaken my "tickling = attack, must defend self" instincts and get kicked?