however, given that this is generally an anonymous forum, it is a mute point
Not a moot point at all I'm afraid. Because you post under a nom de plume does not grant you immunity, as some posters have found to their regret, including at least one Australian who was obliged to publish a letter of apology on Pprune. Pprune administration will give your details upon legal request and you are easily traced.
Absolutely nothing wrong with a heads up, just be careful of the terms in which you couch the advice, and be sure it is objective rather than a rant.
Thanks for the advice on knitting. When are you young pups going to learn to spell, hope you pay more attention to detail in your flying.