I think the OP makes a good point -- I would support some sort of warning and an option to remove Astarian from the game. I had no desire to have the vampire from SoD/BG2EE in my game, period, and there was a (very hard to find) way to ensure that character never showed up.

I haven't had the experiences that the OP has and so I react differently. I want Astarian in my party but I also want to give players options and warnings.