You can prune the runners in any way and as often as you wish.

For a tidy look, remove them at their base where they grow from the mother plant.  Or simply shorten the runners to get them off the table.  

If the plants are healthy, new runners will emerge, especially when the plants are exposed to long nights and short days.

Use trimmed spiderlings to increase your plant collection if you wish.

Learn more here:

https://hort.extension.wisc.edu/articles/spider-plant-chlorophytum-comosum/ 

After a second look, I see you are asking about the plants' leaves, not the runners.

In any case it's ok to cut the leaves back a bit.  This might or might not affect the plants' appearance depending upon their growth habit.