Still, what is the alternative, how would you make a   better (friendlier) TSA? 
Its not about friendliness.  Its about clear, coherent rules, professionality, consistency in enforcing those rules, and having a reasonable way to contest a fine/violation.  IMO, the absolute power wielded by undertrained, semi-educated, entry level employees in a system of infinite bureaucracy should warrant some concern.  As for making it better, here's a thought.  Boost the pay to about $100,000 a year, raise the application requirements and dramatically increase the level of training.