Getting jumped in other Subs for being a SD

I've had a few instances where I'm trying to advise someone in a non-sexual or non-sugaring sub and some Karen/Loudmouth decides to announce to everyone that I'm not qualified to speak on anything because I'm a sugar daddy.

I shouldn't let it annoy me, but occasionally it does. It recently happened when I was trying to advise someone whose husband had recently died and Karen came blasting in there with a big "don't listen to him!" I'm pretty good at retorts, and put her in her corner and it shut her down, but I just found the whole thing annoying and disrespectful to the OP (more than to me).

Any advice or experience you might share about this?