Well...most new people don't now much about anything that they are new to.
I think that it is just a kind reminder to first stop and consider that you are asking other people's help and assistance with nothing to give them in return. So, you might as well help them out as much as you can by first checking your code and making sure that there are no simple variable misspelling or a dinky mistake.
All in all, it sounds like a good idea to me. A slight reminder here and there will never hurt anyone.
print chr($_-39); # Easy but its ok.