My biggest regret ever is learning French. I decided to take French in High School when I was 16, just to learn how to speak a second language in the hopes that I could attract girls (as I’ve never been in a relationship). I studied hard for a good 4 years until I was 20, learning the language inside and out yet no women ever came of it. I wasted 4 years of my young adult life learning a dead language when I could have spent it learning how to actually get with girls.
I am fairly comfortable with the fact that you can pretty much piece together me as a person with a decent google search but geo-located data so closely intertwined with ones social graph is unsettling, even to me.