I haven't noticed this phenomenon. I just searched in April and there are zero hands where I went all-in and got called by a $5 shorty. They're all big pot hands.

Wait a second, 6/6/6? How about just don't play with them. I can't imagine how someone that tight is disrupting your game. If there are 3 at a table leave for fucks sake. With 2 they affect 11% of your hands at most.