Not to defend rasengan (my opinion of him and his freenode tyrancy is severely negative and I fully support the actions of the ex-freenode now-Libera.Chat team) but as someone who previously had access to the Snoonet servers and as the developer of the open source IRC server software that Snoonet uses (InspIRCd) I can confirm that there was no message intercept ability on Snoonet as of a few months ago when I resigned. No SSH access was given to rasengan on any servers all of which were locked down pretty heavily to a small subset of staff including formerly myself.

I think it is very unlikely that any surveillance capacity has been added since I resigned given that the remaining volunteers (who were not appointed by rasengan and many of whom predate rasengan's ownership of the network) are decent people who would not tolerate that. InspIRCd also makes it very hard to surveil users without them knowing (and I've made it harder since becoming the lead maintainer) as it sends notices to all users on connect if rawio debug mode is enabled and all loaded modules are listed in `/MODULES` which is explicitly exempt from being disabled in the config. Being open source it's technically possible to disable these checks by editing the source but from what I have seen rasengan is not a very good programmer[1] so he would probably not be able to do that without being caught.

[1] This mess seems typical of his programming abilities: https://github.com/toc-irc/jbnc/blob/master/bouncer.js