Legislation on this issue is very weak, because penalties should discourage people from doing such things - and they actually encourage them to continue on the same path. Long-term prison sentences are one of the measures, but also the confiscation and prohibition of the tools they use in their criminal endeavors. By that I mean restricting internet access to such people, which may seem like a very radical measure - but if someone commits an armed robbery, wouldn't it be logical to ban them from owning a firearm for the rest of their lives?

The Internet may be perceived as one of the basic human rights, but some use it only for bad things, and I do not see that it would be bad to deprive them of that right.