My main rule is respect... you want it from someone? Than give it to that someone. If you have the potential then do it, otherwise you are wasting your time bro.
naaa.. you have to do a great deal more than than to loose my respect. But it as a teacher it bums me out when ppl do this. I took spanish for 10 some odd years and can speak it 85 percent fluently now because of that. No matter how lame something may seem, the experience alone gets you ready for life. Ya I know, what a frickin cliche but its true in the end.