Sane chill Betas fly under the radar and pass for something else.

SLE -> LSI/LSE
LSI -> ILI/SLI
EIE -> IEI/IEE
IEI -> EII/SEI

Loud annoying ones leave an impression in your mind that sticks there forever.
All it takes is one or two jackasses to prove the stereotype.

Lets be honest Betas gone bad are fucking trainwrecks.