In seriousness, though, you’re quite correct. We are becoming increasingly lax in our use of language. Someone else posted that this site used to be a place where you could hone communicative skills. Some people still challenge the intellect here.
Others just talk about ‘marshall law’. Sigh.
Yes. Don't expect your reader to understand you if you don't know when to use 'then' or 'than', 'of' or 'have'. We ought not resent the grammar police; we should learn from them.
The grammatical skill of untaught frontiersmen of generations past surpasses even most Ivy league graduates these days. The high point of the language is far behind us.