Of course language is a lot more fluid than hard-liners give it credit for, but then the flip-side can be slightly anarchic and needlessly cumbersome to interpret. My friends and I used to make up words all the time (I'm sure most people do), and it was our own sort language dialect, but was it really full English? Dunno. Sometimes things irk me, like use of the word Platina to mean Platinums (a word that is also made up basically), because often they're just needless and there's a perfectly good word for it already, but meh whatever. Most of the time people say these things tongue-in-cheek and it's just hard to tell in text. I find I might comment on it (I commented on a lack of comma in a book yesterday) just because I notice it, but I'm not thinking "that's wrong!", it's just a deviation, customisation, or usually an increasingly common modernisation of the rules.
(....man.)