It really depends I suppose. If you consider the accused to to be in an unearned place of power, it might feel like an acceptable thing to do (albeit still quite icky and pedesterian). But if the situation is very different and/or you are not sure if your PoV is fully justified, this can absolutely be the most toxic low-effort thing one can do when thrown at someone who's already fighting an uphill battle. Without going to specifics this is something I've experienced myself, and have also seen happen close to me in a very toxic calculated way. So these kinds of comments are IMHO overally very unconstructive.