1. The scroll function is updated every 150milliseconds so you could, in theory, use something like scheduleAfter() to manage the # of clicks you receive over a particular time span. If this # of clicks is > 1, then accept the value.

2. Use something like square root to accomplish deceleration and round down/up. 4 clicks -> 2, 9 clicks -> 3, etc... Simple division will also work but square root might be better or perhaps a logarithmic function.