Like more than 1% of the American population, I have a tremor. It's minor enough that I don't have problems with any apps except for one: Stack Overflow. When I try to upvote a comment, my tap often registers as two taps, canceling itself out. When I then try again, I'm told that I cannot change my vote so soon. Please consider my use case when setting timeouts and vote changing policies.
I understand that you can't come up with policies that are idea for everyone but did want to give you the data point.