Most everyone I've seen and heard that was anti-compression had either used a "bad" compressor (e.g. Not good for bass) or thought they needed to have the compression knob at noon or above for it to do anything. For those with a high end compressor that don't understand what it does: set the compression (or ratio) knob at 9 o'clock, and bring the volume knob up to unity. You will likely not hear too much difference while plunking around at home, but I assure you, if you keep it on at your next show, you will notice it and you will like it.
Every bass recording ever has had some compression applied. Every quality FOH rig has compression available. You have the opportunity to learn how compression works, what it does, and why it's used. You can either use it yourself, or forever leave it in the hands of others. But seriously, it's impossible to say that you never use compression because if you don't, someone else will use it for you.
Which raises the two obvious questions... what is good compression, and what is a good compressor for bass? There are a million of the ****ing things. AND, in my case I'm looking for something to go in a 500 series box, but for live performance.