Probably aging myself a bit, because this will come across as old-fashioned, but isn't holding them accountable to blocking how you build a culture? I'm with you on the frustration of not getting our best pass catchers on the field, but if they're lazy with blocking, I'm sure there'd be those that #1 - actually noticed #2 - bitched about it. FTR, I probably wouldn't notice if they blocked or not, but I'd notice it if Boobie housed a couple of passes.
I liked
@huskermack post above. Why can't they just do what they're asked so they can see the field?