I don't plan on doing so, but if I did, I certainly have a few select words I'd have to address them. Each of them would be different though, some mild and some more extreme. For example, if it was addressed towards someone who had the capability to make my life slightly better (with little cost or inconvenience for him/her but said person just refused because he/she didn't want to (selfish and what not)) and yet lives a double-standard (one rule for him/herself, but imposes another one for me while holding me to a unreasonable standard), then yes I would have some harsh words for said person.
I'd call them hypocrites and wish them some shitty life during their limited existence, especially if they are pro-lifers on top of it.
On a lighter note though, for someone I might not care about as much but is still an enemy albeit had a more minor impact, I'd just be lighter but slightly snarky to them. I'd address them somewhat sarcastically but somewhat mock them just as a slight spite towards them.
All in all, and most likely with what I already have to deal with in my current life, I'd lambast society as a whole and work towards spreading my message far and wide as much as I can that I won't have the time nor care enough to try to get back at my enemies (unless self-defense). I'd more focus on succeeding in my self-deliverance when my time comes and go with the idea that once I'm gone from this world, my suffering ends and no more bullshit (unfairness, injustice, unfulfilled goals and dreams, torment, daily grind, shitty life, etc.).