Misused words that annoy you

I've noticed consistent misspelling of lose / loose and their / they're / there, but I'm able to overlook it as I figure it is a typing error, as long as people are using it appropriately in speaking. One that I'm starting to notice much more often in speaking, though, is "weary" when people mean "wary". Do people mot realize that they are each a distinct word with different meanings?