I know many people who've been banned by Sentinel before. Most of them appealed of course.
But I've still never seen a Sentinel-ban appeal getting approved to this day....
But it's not really like I blame anybody for this. A moderator probably doesn't know how Sentinel works (how would they it's not like they applied for developer or something...). Since they don't know how Sentinel works, how would they know if you're lying or speaking the truth in your appeal? Sometimes, it might be obvious but lots of times probably not. Honestly, I would probably have to do the same in a situation like that if the appeal didn't contain any significant evidence like a screen recording (seriously how would I know?). It has come to the point it's almost like they don't have much of a choice....
But hey, the "Discuss your appeal button" is there for a reason ; ).