I’ll clarify my view (not speaking for anyone else). If a person has no sig and is giving opinions about a subject, I may not place any value on that opinion as I have no idea of their experience. If I see someone with no sig, has never posted a picture anywhere, and has a spurious history of posting…then I don’t place a lot of value on their posts ( i.e “Troll”…it’s very easy to look up anyone’s history). To me, it becomes very clear when someone has REAL experience. A sig provides a quick reference to someone’s-it’s a courtesy to others really. Past or present rigs…that’s up to you (Some sigs do get quite lengthy.)
To get back to the OP; I tend to stick to the Forums I have experience with or have a specific questions related to. Ex; I have never owned a Class A and am not looking to at this time, so you wouldn’t find me hanging out there.
Bottom line I agree with what was said somewhere above; if you don't like it...don't read it.
But a sig and a pic of your rig in the appropriate forum is good on-line etiquette.