YARN
Fleet Captain
I have the benefit of knowing how TV shows work.
I have the benefit of knowing how words work.
What you have in this proof is an ambiguous example. It seems likely that Q intervened, but we don't know.
Even if we to accept this as an clear-cut example of Qs benign intervention, we still have to consider the overall character which is demonstrated in the course of these episodes.
If the Q really was only pretending to be a tormentor/trickster with the EQ of a 13 year-old school yard bully, we have to consider scenes where we have seen Q speaking and acting without humans around. In scenes with humans, we might suppose that it is all an elaborate act for their ultimate benefit (of course, this interpretation involves speculation beyond what we're shown on the show). Consider, for example, that private scene in the shuttle craft where Q is interacting with another Q. As another poster noted, this scene reveals that the Q really are bratty.
At most, Data's characterization is most apt. Q tends to look out for Picard like a favorite pet - Picard is an ongoing amusement for Q.