1. Anyone here NOT practice to a click?
Sometimes yes, sometimes no. It depends on what I'm practicing, and why. Sometimes I'd just play along to my favorite band tracks, and depending when they were recorded, there may or may not be a click, and if not, the time may or may not be very good. There have been instances where I can really feel those tracks fluctuating.
2. Are there any famous drummers that never played or couldn't play to a click? Who?
Probably most drummers who were active prior to about 1975. That's not to say that there wasn't strict time employed, conductors often used a metronome to guide an orchestra and rhythm section, especially on TV show themes, movies soundtracks, and assorted pop recordings.
3. What do you all think of the very common practice of editing/gridding drums in recorded music?
It's just a part of making music. Sometimes it's nice be able to enhance or fix parts, without the time-consumption of punching-in and cleaning up the resulting glitch. It makes everyone's life easier, makes me sound better, and I get paid the same.
I have no problem with clicks either in the studio, or live. I have no problem without them, as well. I don't feel it's a crutch that I'd stumble without, although there are drummers whose time is pretty poor without it. They don't work a lot.
Bermuda