Nope - just showing some who holler, "but they broke the law", as their fallback argument that they are hypocrites and will use any argument to keep from actually thinking about it. Since they call for "purity", they really ought to be willing to be as equally "pure", else their arguments are "Quite the sorry hill you they have staked out to fight on". "I'd wager some of self-same stone-throwers have broken some pretty big laws in their lifetime, without getting caught, and would never consider that they should pay the piper.
First of all, the poster in question made no such comment - you just were itching to jump in with your latest contrived talking point.
And second, what you call purism is basic sense - the illegal immigration debate is littered with those who gave lip service to border security and enforcement while pushing for amnesty. So the skeptics are the ones acting in a reasonable manner - any talk of border security needs to be decoupled from talk of amnesty to be taken seriously.
Your purism schtick has been used to bash conservative positions from abortion to anti-gay-rights to gun rights and now this.
It has an even more sorry history than the amnesty shills.
Pay your use tax religiously? Report as income all services, you receive. Loan someone 20 bucks. Did you report the imputed interest you received, even if you did not receive any. I'd bet your interlocutor needs some hard time in stoney lonesome for tax evasion if nothing else.