That's an intriguing question. Please tell me your experience. I am gladly to hear from you.
Anyone else who does it is welcome to answer as well!
Given that English is now an International lingua franca, it's possible that it will become an international pidgin for those who don't want to learn or use the standard language.
However, ever time a non-native speaker uses sub-standard ghetto-constructions in otherwise good English, I'm not sure whether they realise that it's not the sort of thing you'd write if you were trying to write a good English sentence. Also it gives the impression to other learners that it's normal; and that's why I challenged it - and probably will periodically continue to do so while I'm on a site that encourages the use of Standard English.
I agree with most of this, except for the pejoratives "sub-standard" and "ghetto". I would say simply "non-standard", since there was a time when features like punctuation and rigidly prescribed orthorgraphy were also non-standard. My personal peeve, which I'm convinced is a lost cause, is the increasing use of "loose" for "lose". I definitely do agree that use of non-standard constructions should be pointed out in fora such as these, for the benefit of learners.
Is that language a reflection or the driving force of this decadence?