Sabotage is arguably far worse than theft; would be glad to have this kind of unreasonable-malicious individual filtering themselves out of my company - and ironically they certainly are a supporting point for companies who want to monitor and control to catch stated malicious behaviour/sabotage; they clearly have resentment and won't be as successful themselves as otherwise because they're wanting to waste energy, perhaps energy from anger - but certainly that of resentment - rather than directing it to do better themselves, which doesn't include sabotage or wasting energy; that's a violent and self-harmful act IMO.

Re: theft - they didn't mention theft in their comment (unless they edited it out; why not version control on HN?) but the problem I have with theft is that it allows thieves to gain resources that they didn't develop to earn themselves, that they don't yet deserve - giving them power they don't deserve nor have learned how to wield adequately.