I guess If you had a sign that they could see,telling them what happens to applications with bad grammar they would be sure and take that application seriously,but then again,by giving them a heads up,they would fill out the application being attentive to grammatical errors but they wouldn't be doing It because they really take the job seriously In truth,but to have a good looking application,then again,man looks at the outward appearance.
Maybe you should add some kind of question to see If they really want the job In truth or If they just want any decent paying job.