I've thought about it a few times
I'd use the power to steal vast sums of money from drug dealers and pimps, and then use the money to travel around the country, NOT using the invisibility, to meet all the great people I've been exchanging PMs and eMails with here on TMF. The only way I'd use it to tickle would be by pre-arranged
prior agreement, as a form of role play.
Let me also point out that invisible does not mean insubstantial; if it did, you would not be able to tickle anyone. This means that flailing legs and arms would make contact and leave bruises, which, while invisible, would still hurt.
Tulip, if you tried that on me you quickly find yourself pinned under a very large, very visible bulk, and as soon as I realized I was dealing with a female, I would start tickling back. I don't think it would take me too long to figure out, especially not with your highly feminine figure!
To the guy who would tickle one unfortunate girl to insanity on a beach; hey man, your footprints in the sand would give you away, and even if the poor victim were completely helpless from laughing, someone in the crowd would throw a punch or kick in the right general direction. I know I would, and I'm sure I'm not the only one.
Nonconsensual fantasy is one thing; NC in real life is something else again. Especially when you start talking about driving someone insane.
Mastertank1
We who play and dance are thought mad by they who hear no music.