> should I flag it for moderation attention?

Yes. These are obvious cases of spam, and usually the moderators will find that these users:

- signed up with fake e-mail addresses
- don't even come from where they claim they are
- have several colleagues behind the same IP

The sole purpose of these accounts is to promote their products without proper disclosure and without really trying to help someone here. Sometimes they think they're clever and pretend they're asking real questions. Sometimes their colleagues will be happy to help them out by providing even more fishy answers—but their intentions are still the same.

We've had the same on Super User, literally hundreds of these posts have been deleted now.