why bother adding friend you dont know? with friendlies meaning jack squat now, its all about making sure they are not in the same level. If they are levels below you or above you, friend them all you want, but stay away from people at the same level and you never have to worry about them in the same league just in case they do buy tokens.
and this one you post pics of, I would say a mild token buyer or a serious token farmer. there are too many players with only one position to be a medium or serious token buyer, so frankly, as long as you are mostly 5*, you should be able to at least compete with this person. but best just to avoid them.