There's an official answer. It's not supposed to be used and is against the ToS.

It's a minor issue. They just don't want people to use parsing to grief others and making players feel alienated or singled out. One of those grey areas. If they said, "it's allowed" they would basically be saying it's ok to single people out for under performing, even when they are trying their best, thus creating a bad environment to play in.

I mean... does your government follow every law to a tee? Have you never speed 5 miles over the speed limit on the road while driving? The law says 60mph, I went 62. Why don't they enforce things?! Kinda same thing. It's not that big of a deal and if you went to court and the judge saw you were pulled over for speeding 2 mph over the speed limit, I'm pretty sure he'd laugh and just tell you to go on your way. It's not a big deal.