There's a vast amount of SPaG errors on any thread you could read, here or anywhere else.
I can't believe that the SPaG police point out all and every single incursion! Those that I've noticed have looked just rude, because coupled with lack of any passing interest in the topic shows that's how it is intended.
We all have to take responsibility for our communication, which is especially hard when only written, and some are so much more fluent and posess wider vocabs, so find it a lot easier, naturally.
Forums are not about SPaG though, they're about the real joyous and difficult stuff of life.
To those saying that some posts are unreadable, you should move on, or develop a more flexive approach to others.
I would ask, to be sure of my understanding, if absolutely necessary, but I haven't actually come across anything incomprehensible or undecipherable, although the example of 'ect' (etc) ^thread has thrown me, and I don't recall ever having seen it.
I also hate device touch-screen keyboards, as the level of typos have exponentially rocketed since.
They are notoriously poor at written language.
If they were actually any use atall, then no-one would ever make typos or noticeable errors!