I too have not much strong opinion but if I someone asks me while I am drinking in the pub on a nice evening with an intend to start a conversation with me then I would say, yeah put some restrictions (possibly allow a minimum rank) for users before they are able to create flags and also to vote. This will eliminate the brand new fake accounts to abuse with false support or oppose in a flag.
For voting - maybe. For creating a flag - no. Scammed newbies need to be able to create flags. It would be nice to have a limit on how many flags they can create but on the other hand Bitcoin SV and other "advanced" sockpuppets are able to farm merits fairly easily so that wouldn't be much of an impediment for them anyway.