[Sailor Steve]

I think GWX reduces the 'Range To Opportunity Targets' in the Main.cfg by a bit, but it can be reduced further. A long time ago there was a mod that reduced the number of single ships by 80% and then reduced the number of reports on them by 80%, making it very unlikely to encounter single ships in the game. Unfortunately the author had to change each individual ship, and with several dozen new ships in the game since then it doesn't work anymore.

Me, I never chase down any single-ship report, on the assumption that they came from an unreal source anyway.