[jjk166]

The lack of an "and" between "delete inflammatory content" and "block users" unambiguously makes it a list of three items. The oxford comma, while useful, is not necessary here.

[readflaggedcomm]

So you're saying the obvious interpretation of the text is impossible to render because you insert grouping breaks where you please? I reject that.

[jjk166]

According to your "obvious" interpretation, the sentence is:

"We found that people like some features that are already present in social media, like the ability to delete inflammatory content, block users who do X."

Does that sound like a grammatically correct complete sentence?