I'd say nay since I really don't see the difference of either giving a company my money or not and I mean in the way of looking just at me since it would imply that everyone else is paying.
There's enough of people who either don't know about piracy or the other ones who just don't do it. The devs get enough money anyways imo.
But then again, if everyone would look at this way we would soon have no games at all.
Also it depends if said game has a demo or not or is console only or not.
I'd rather illegally try a game out, see that I like it and buy it afterward to enjoy every feature instead of buying something and being disappointed.
Console games on the other hand are a "go by luck" if a demo for a game doesn't exist. Since I don't either want to brick my console or get banned from online playing.