As noted in VERY LARGE PRINT at the top of almost every open source license for the last thirty years or so, the person taking the free stuff is responsible for whatever happens when they do. That's why it's free!
If you can support it yourself, great. If you can't, then you might need to hire someone to do so. If those options don't appeal to you, then you should probably buy an alternative that does not explicitly tell you that you're on your own.
Open source software exists so that the community of reasonable, responsible people can share work with each other without being caught in a rats nest of finger pointing, liability, and defensive practices like hiding source code or preventing alteration.
It is a two-sided contract, and the user's side of the contract is very explicitly to take responsiblity for what they choose to do with what they take.