> I prefer retaining the option to sue people that pull stunts

If that's an option for you, sure. I work in finance and retain FINRA arbitration as a customer. When I'm signing with clients, I do not like to include it--I have a strong advantage in court and don't want a venue that's biased against me as a professional.

All of this is totally irrelevant to ETFs, mutual funds and CMOs because those are distributed funds whose terms aren't negotiable after offering. (If you're worrying about suing the guy selling you ETFs, you're doing something wrong. Probably overtrading.)