Then don't do it. But please don't discourage others from doing it. My own detective work in the past has turned up lots of sold/hacked accounts, and you've got to be aware that there's too much bullshit going on in the forum that if it weren't for those members delving into suspicious accounts, people would be getting away with everything under the sun.
I don't know what was your reasons not continuing with the detective work you used to do in the past. But I saw many users to be in trouble because of doing that. They continue, keep making angry users against them, at some point the opponents get opportunity to get their revenge. Everything creates a bad environment and users start hating each others.
You and me could disagree but I think it's better to contact someone via PM and tell them what you think. Give then time to reply you. If you think it was not satisfying then ask public opinion.
If someone has changed their posting habit and regular in gambling board with wearing a gambling signature then it make sense that they are following the signature rules and posting to fulfill their weekly posting limit. Not everyone has genuine interest to post regularly.