I don't think people should be forced to use public infrastructure and services, simply because tax whores won't allow competition.
How is that possible?
Easy, by not being an asshole, oh wait I forgot! That's too difficult for some people!
I mean, how is it possible for someone not to use any public services or infrastructure?
That's another of the "basic" questions that libertarians and anarchists get tired of answering. But I'll give you a brief synopsis, and recommend some reading for you, because the subject has been covered in depth from multiple angles.
The basic gist is, that if a service is worth having, it's worth paying for, and if the money has to be stolen, then it's probably not worth having. Most "public services" are completely unconstitutional in the United States, but they exist anyway and we pay for them whether we use them or not. Which creates more of a free rider problem than the system that anarchists envision.
Prior to the "public" (read government) seizure of all roads, most roads in most countries were turnpikes, and the system worked well. That's just one example. I'm tired and not willing to go in depth right this minute, but here's some good resources:
For a New Liberty by Murray RothbardThe New Libertarian Manifesto by Samuel Edward Konkin IIImises.orglewrockwell.comI couldn't care less about the US government and I particularly dislike the usual type of US American libertarianism, but hey, it may make sense there...
So, I guess the answer is, people cannot do anything without using public services and infrastructure, correct?