Uhm. You're living in some sort of velcro 3rd world country?
Seriously, while you can wiggle them around much easier than a full- or medium-sized pedal, I never had any issues when operating them as intended (stepping onto the switch, that is...). If anything, what bothers me most with them is that there's still no standard for the PSU connector (and sometimes not even the I/O jack locations). And if I was ruling the world, no single pedal would be allowed to use right/left I/O jacks, they'd all sit on the top. That way, the pedal could be a bit wider without sacrificing pedalboard space (thing along the lines of TC, J. Rockett and what not, perfect form factor).