He didn't use "sarcasm" to mean the opposite of what it actually means. Because his post could be read as sincere (unjustified) criticism of Google, he used th

He didn't use "sarcasm" to mean the opposite of what it actually means. Because his post could be read as sincere (unjustified) criticism of Google, he used the well-known internet convention of "/sarcasm" to avoid an unnecessary, off-topic sub-thread stemming from his post. How's that for irony.