But surely you can understand what the person means when they say "Look at these new shoes I just brought."? It's a mistake on their part but verbally you can understand it.
Unless you're writing for The Times then I wouldn't be bothered by it.
I would ignore it from a dyslexic. Otherwise it's just plain lazy, both words have clearly different meanings, they do not sound similar, there is no excuse except bad English. Inb4 comma splice.