Wanna solve the problem of getting screened upon return to the country? Its simple…don’t fly in the comfort and speed of a plane that lands at an international airport. Instead, hump all your vacation bags to one of the borders and attempt to get across the border in obscurity.
I guess if you want an exciting vacation, that might just do it.
As for the ones coming in illegally…that problem is never going to go away. Sure, we can slow it down with better measures at the borders, but a motivated criminal will eventually figure out a way around even those measures. Is it your premise then that because some people simply won’t follow rules, we just shouldn’t have rules?