I've seen some very bad and downright scary behavior at our local public range.
Hate to say it but the ROs are completely worthless since the state stepped in and took it from them.
You have four options at ours.
1- Ignore it and keep shooting (I don't care for this option)
2- tell a RO about it (same as ignoring it)
3- Tell them yourself, having the possibility of getting into a big confrontation...which stupidly is the one and ONLY thing that apparently will get you kicked out
and if they don't kick you out it will still have the same result as # 1 & 2.