It is definitely not a regional thing. I know people from New York to California that add an "s" to the end of everything. I can tell you that most people neither know nor care about the proper use of grammar. If it sounds ok and everyone else uses it, then no one notice. Correct grammar usage just is not high on anyone's priority chart. If you read most articles of magazines and newspapers this will become painfully apparent.
If only you had checked your own before criticizing it in others.
I've never heard 'offsides' used before. I think it might drive me insane.
Yes, yes it will. Like, 90% of Americans say "offsides". It's maddening.
I feel like nitpicking too.
I hate when the ref calls a defensive linemen "offside" when he should specify "encroachment".
Same penalty (5 yards) different action though.