Are there any disadvantages against using qsub to run tasks all the time?

When I'm running a task on a computer network? I've just started to realize that if I qsub *any* task, then the task won't hog up my terminal, and I can do other things on the same terminal (which is quite useful even if the task only takes a single minute to finish). And then I run qstat to see which taks have finished and which ones haven't. http://pubs.opengroup.org/onlinepubs/009604599/utilities/qsub.html is a good explanation of qsub.