If it ends up being food poisoning at some unacceptable rate of occurrence with provable link to McDonalds burgers, I would welcome investigations and incremental improvements. What I wouldn’t do is call for McDonalds to be defunded/abolished, or for fast food to be replaced by an alternative food system, or label anyone who disagrees as racist, or inject my ideology into schools/companies, or censor those who disagree. Nor would I participate in repeated rioting resulting in several deaths and billions of Dollars of damage.
Instead I would work within the system, in a legal and civil manner. I would welcome an open debate in the spirit of classical liberalism. I would want a nuanced understanding and nuanced set of actions to result.
Lastly - would I spend time defending McDonalds on forums? Probably not since it’s not that important to me and I have other fast food choices. But I only have one local police force to depend on. And the safety of my own family and property hangs in the balance. So I would definitely engage on that topic.