Like all subjects, let me throw all my cards on the table so hard I'm likely to sprain something. A lot of pornstars an porn industry workers have it bad. Even if you think it's only a few, or a small percentage, or whatever, we can at least agree that conditions could be better, right? So with that in mind, instead of arguing whether porn consumers do or do not have culpability, lets see if we can make the industry better! How do we do this? We stop demonizing sex, the sex trade and intimacy outside of marriage. We've come some way in this, but still, there's a ton of work to be done in the U.S.
Instead of pornstars being looked down on, they could be treated like actual stars. A lot of the problems in the porn industry are problems that used to exist in the mainstream movie industry. The power that studios had over actors was too lopsided and it was rare that an actor could negotiate on an even footing. Sound familiar? So how did the movie industry change? Stars became so popular, so sought after, that studios had to fight over them, offering them better and better deals. Consumers empowered actors by making them popular icons. The same could happen in porn, if we were to throw off sexual shame and empower pornstars the same way.
As with all exploitative industries, simply refusing to buy anything in that industry probably won't help. You don't take an abused worker and make their life better by throwing the industry they work in out the window. In a lot of cases, it isn't that the alternative to a bad job is a good job, it's that the alternative to a bad job is no job.
In short, support your local pornstar!