+2
There are two ways to approach this question, one personal and one a bit more empirical:
1) Comfort. If he creeps you out now and takes you out of the movie, then maybe it's not worth it. This is a personal thing, influenced by the seriousness of the accusation, the degree to which you feel it's likely to have actually taken place, and a lot of other things.
2) Economics. Even if you aren't bothered on a personal level, there's a real ethical question about whether you should support the work of someone who's done something you strongly disagree with. Increasingly, even watching such a film on a streaming service, let alone buying it outright, has an effect on that actor's career: sometimes pretty directly. The effect is usually indirect, though (and if you're willing to boycott things over indirect effects, I'm not sure you'll find a logical stopping point), and in the case of a movie you already own, for example, it's non-existent.
Personally, I have very few people that qualify for either criteria, though I take the second a little more seriously when the situation arises.