Is it possible to reply to a topic without bumping it? I think this would be a very useful way to warn others of scammers, trolls and suspicious posts without bumping the thread to the top where more people can see.
You need to make some consideration before making the reply instead of bumping, though there is nothing bad at least in making a bump once a week or so, as for the reply, if you're not the last that replied o same thread and you feel like there is more to add as an additional information concerning the thread, then feel free to make your reply, we also bump in other to avoid spamming because you will discover some are just making post without having any quality content in them.