As I've said, the Rickenbacker one is a special case, because they are protecting the entire design as IP; therefore anything which looks remarkably similar to a Ric is in scope. And lso as previously mentioned, I think it is relatively easy to spot a Ric bass copy/fake, as none of them quite get it right.
I think that in Ric's case, perhaps the baby was thrown out with the bathwater, but I can understand why the approach from Rickenbacker was perceived to be belligerent and the decision as-was was taken.
Of course I would not suggest a blanket ban of all brands for which there might be a copy a-la Rickenbacker, as that would clearly mean that nothing could be bought and sold!
But in the case of other guitar brands, they've really only got their logos and some fine detail of the design (eg. Gibson's "moustache" headstock), so Fender-shaped instruments; I would think that a policy of disallowing them and removing offending ads when flagged (much in the same way as removing offensive posts) would be a lightweight and practical approach.
Squiers with Fender logos applied, Chibsons, etc.; they are simply a deceit.
(I've not idea what's going on with Limelight, as they should be standing in their own right; I remember Peter Cook's Mighty Mite range in the 70s - he never felt the need to put "Fender" on them!)