I dunno man. I agree with you on that, of course you're right. But, people have limits not everyone wants to talk at length to a libertarian so mockery is employed.
In a public general-interest Internet conversation, when you reach the limit of your willingness to productively engage, it may be prudent to cease engaging.
I wouldn't write off mockery as unproductive. It's been an element of perfectly productive political discourse since the beginning of recorded political discourse. If done well and in an informed fashion, it ends up dispelling the illusion that any ignorant bit of pseudo-theory someone can conjure up is worthy of the public sphere.
