I use paracord in my taller boots, and I haven't had much trouble with them. However, I cut them long and wrap them once around the top of the boot. Helps keep everything tucked in where it belongs, but it might be a case of tension being applied in two directions. Never really thought about it.

If you want to try, cut them about 14-18 inches long. Lace them to the next to last set of eyelets, then wrap them around, and thread them through the last eyelets. Tie with a double knot. This has worked for me for years, and it keeps the snow out.