whereas the idea of avoiding tax is highly attractive, the consequences are often overlooked.
On the one hand side it is a criminal act, so taking the risk of trusting crypto code and going one day (years later) into prison should not come as a surprise.
What I think is even more important: countries, where people pay regular taxes, have proper infrastructures, which make life easy (see Switzerland, Germany, Austria...). Compare this to countries where people have a faible for not paying taxes. You will find, that their egoism is to the disadvantage of the community. And this creates unbalanced distribution of wealth, where jealousy and envy create a layer of low-level criminality, which then increases to the next layer(s). Looking at third world countries, or BRIC countries, or even the US (probably the most funny example in this enumeration): in principle a very rich country, but the country with the highest amount of people in prison per inhabitants. What a huge problem!
Yup, thinking about tax avoidance is a difficult matter, and bearing the consequences of a short level egoistic thinking might have disadvantages.