My perception of Red Tag in the forum has changed vastly compared to when I newly joined this forum late May this year.
I think it's only you who noticed that. Most users joining 1Xbit for example are ignored in the forum. Don't worry even they are lots of them that won't hurt the forum's overall looks. No need for a remedy or solution. Don't make it complicated as what you noticed is far from happening.
You can put them on your ignore list and just do your usual communication and exchanging replies with each other.
You are right, this is a perfectly good solution. You can't go wrong if you put all 1xbit shillers on ignore. Most members ignore them anyway, from what I've seen.