Film them immediately
with your own commentary
plus all around bike and car
ask them to remove face coverings
Ask for their licence
suggest they are targeting lone women or women with kids
even if you go into the back of them, if they cut you up it is dangerous driving on their part which is a criminal offence
call cops
warn all female drivers you know of this scam so s they are prepared!
because of this thread I have become aware of mopeds circling, changing direction when they see me etc